Use UVA technology, remote distance can reach 30M, three lighting modes for choose, can direct penetration of obstacles and according sunshine of each season to adjust。

The most suitable mode can be selected according to seasonal sunshine conditions.

Model A: Time Control Mode

3 hours 100% Brightness => 3 hours 80%

Brightness => 4 hours 40% Brightness => 2

hours 100% Brightness.

Model B: PIR Induction Control Mode

3 hours When Human Sensing 100% Brightness, otherwise 90% => 3 hours When Human Sensing 100% Brightness, otherwise 80%       => 4 hours When Human Sensing 70% Brightness, otherwise 20%     => 2 hours When Human Sensing 100% Brightness, otherwise 80%.

Model C: Time Control Mode

3 hours 100% Brightness => 3 hours 70%

Brightness => 4 hours 40% Brightness => 2

hours 90% Brightness=> 3 hours 100% Brightness.

The remote controller is powered by two 1.5V No. 7 batteries. It can switch the LED lamp and write parameters to the controller with one key.

Remote control switch: when the remote control is turned off, press this key once, the remote control will be turned on and the indicator light will be on. When the remote controller is turned on, press and hold this key for 4- 5 seconds, and then release it. The remote controller is turned off and the indicator light is off.

Light On: Turn on the LED lamp: when the lamp is off, the remote controller is aimed at the transmitter and receiver of the controller, and press this key once, and the LED lamp is on.

Light Off: Turn off the LED lamp: when the lamp lamp is on, the remote controller is aimed at the transmitter and receiver of the controller. Press this button once, and the LED lamp turns off.

Mode A: write a complete set of lighting modes and save them to the remote controller. Align the remote controller with the transmitter and receiver of the controller. Press this key once to write the lighting mode into the controller.

Mode B: write a complete set of lighting modes and save them to the remote controller. Align the remote controller with the transmitter and receiver of the controller. Press this key once to write the lighting mode into the controller.

Mode C: write a complete set of lighting modes and save them to the remote controller. Align the remote controller with the transmitter and receiver of the controller. Press this key once to write the lighting mode into the controller.

Remote Control User Manual of Solar Street Light最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

Brief:
Our integrated solar street light which integrates the green-energy parts Solar Panel, LED Lamp and the Lithium
battery into a single product, with intelligence induction system to gain the solution of low-energy, long-time,
high-luminance and free maintenance. At the same time, it’s convenient in the shipment and installation.
Purpose:
To be installed in the garden, residential area, courtyard, road, mine area or parking area or provide the light in roads
where it’s necessary, the battery provide the energy for lighting, and the solar panel charge for the battery.
Product parts:
The product is made up with the integrated parts (Solar panel, Lithium Battery, LED, Intelligent Controller and
Intelligence Induction System), which can be installed on the pole or wall directly.
Working Characters:
The solar panel converts sunlight into electricity and stored in lithium battery via controller, the LED light will work at
night automatically by light sensor control, and provide lighting for the darkness area, the intelligence induction system can save the energy when the high-brightness lighting is not necessary.

Manual：

• “All in One solar light” can not work without sunshine charging, please select the suitable product model according to the local sunshine radiation and the annual total radiation.
• “All in One solar light” adopts the long-lifespan lithium battery for storing energy, charging temperature at day time is between: 0°C～+60°C, when temperature goes lower than 0°C, the control system will stop charging automatically to protect the battery, and it will revive to charge the battery while temperature goes higher than 0°C. Discharging temperature at night is between: -30°C～+70°C, any ambient beyond will bring damage to the battery. Please confirm your local extreme temperature is suitable for above while selecting the solar light.
• Battery of the “All in One solar light” can be stored for 6 months after full charged, and please examine, charge it periodically after long time transportation to prevent damage.
• While the solar light be installed in Northern Hemisphere, please make sure the surface of the solar panel to be facing the South to collect maximum sunshine radiation, While installed in Southern Hemisphere, please make sure the surface of the solar panel to be facing the North to collect maximum sunshine radiation. At the same time please keep it away from any shadow of house, trees etc.
• Keep cleaning the surface of the All in One solar light with normal detergent to get maximum power generation, clear the dust or tree leaves or any grease.

Installation:

To place the light pole into the best spot with good day lighting. The height of light pole should be more than 3m, the thickness no less than 2.0mm with material iron or steel, the diameter recommend to be within the range of 50-110mm.

Install the lamp on the pole by its Support on the light, Clamps, Special screw and Second Support Brackets if any, steady installation should be ensured.

1. Please Charge All Model of light (without discharge at night) for 3 days before installing;

• Please remove the plastic isolation film on the transparent lampshade if any before using;

• Keep the device away from fire, water and moist places in order to avoid explosion, leakage, moisture;

• Any severe shock or smash to the light is not recommended;

• No one expect professional technician should attempt to disassemble to the light in order to avoid damaging the light.
• This couplet considered as the Protection to fix warranty, so please reserve them carefully.

    Dealer Information Product Model   Product Name   EX-Factory Date / Factory Serial No.   Dealer Name   Tel   Purchase Date   Purchase Address     Customer Information Customer Name   Phone   Address   Email       Comments & Suggestions      

Instruction Manual of Integrated Solar Street Light最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

LED street lights are becoming more and more common as municipalities and other entities strive to reduce energy consumption. Streetlights are an essential part of any city or town. They allow people to see where they are going and keep them safe at night.
According to Chinese LED street light manufacturers, not all streetlights are created equal. Some lights are brighter and last longer than others. What makes the difference? And more importantly, what can be done to improve the quality of LED street lights? Learn more in this blog post.

Why LED street lights are becoming more and more popular?

LED street lights are becoming increasingly popular and for a good reason. LEDs are more energy-efficient than traditional incandescent bulbs and produce less light pollution. In addition, LED street light manufacturers ensure LEDs last longer than incandescent bulbs, so they require less maintenance.
These factors make LED street lights a more cost-effective option in the long run. Regarding safety, LED street lights can also help reduce accidents by providing more visibility on dark roads.
And because they produce less heat than traditional streetlights, LEDs are also safer for the environment. As cities continue to look for ways to save money and reduce their environmental impact, LED street lamp is an obvious choice.

Ten factors that affect the quality of LED street lights

The quality of LED streetlights can be affected by many factors. Some of these factors are within our control, while others are not. This blog post will explore 10 of the most critical factors affecting LED street lights’ quality and performance.

1. The type of LEDs used

There are many different types of LEDs available on the market today. Some LEDs are more expensive than others, but that doesn’t necessarily mean they’re better. In fact, the type of LEDs used in a street light can significantly impact its quality and performance. The most important thing to look for is an LED with a high-lumen output and a long life span. There are two main types of LED street lights: those with traditional cobra-head fixtures and those with more modern, sleek fixtures.

Cobra-head fixtures are the more common type, and they’re typically what you’ll see on older streets. These cobra head LED street light fixtures are designed to cast a wide beam of light, which helps to illuminate a larger area. However, they can also produce a lot of glare, which can be a problem for pedestrians and drivers.
On the other hand, more modern fixtures use slimline LED street lights outdoors that produces a narrower light beam. This can help to reduce glare and make the street safer for everyone involved. When choosing an LED street light, it’s essential to consider both the quality of the light and the needs of your specific community.

2. The quality of the driver

The quality of a street light’s driver is crucial to the overall performance. The driver is responsible for regulating the current and voltage going to the commercial LED street lights, affecting the light output.
A good quality driver will result in a street light with consistent light work and fewer fluctuations. Poor quality drivers can cause the street light to flicker or produce an inconsistent light output, which can be annoying and dangerous. When selecting LED street light bulbs, be sure to choose one with a high-quality driver that will provide consistent, reliable performance.

3. The power source

Regarding street lighting, LEDs are quickly becoming the preferred choice for many municipalities. LEDs are more energy-efficient than traditional incandescent bulbs and have a longer lifespan. However, the quality of LED street lights can vary depending on the power source. If the power source is unstable, it can cause LEDs to flicker or dim.
This is why it’s essential to use a reliable power source, such as a battery backup system, to ensure your street lights are always shining bright. With a battery backup system, you can rest assured that your street lights will stay lit even during a power outage.
Thanks to technological advances, many different types of battery backup systems are available on the market. So, if you’re looking to upgrade your street lighting, be sure to choose a power source that will keep your lights shining bright for years to come.

4. The thermal management

The thermal management of LED street lamps is essential for their overall quality and lifespan. When LEDs get too hot, they degrade, reducing their lifespan and overall quality. An excellent thermal management system will keep LEDs cool to last longer and perform better.
There are several different ways to manage the heat generated by LEDs. One standard method is to use a heat sink, which helps to dissipate the heat away from the street lights LED. Another option is to use a fan to allow cool the LED.
However, the essential part of any thermal management system is the ability to keep the street lights LED cool while they are in operation. By keeping the LEDs cool, you can extend their lifespan and ensure they perform at their best.

5. The optics

The optics of an LED street light play a significant role in the quality of the morning. They help to control the beam pattern and focus the light where it’s needed most. A good optic will result in a street light with even illumination and fewer dark spots.
The benefits of LED street lighting are well-documented, but the optics are the most critical factors in determining the quality of an LED street light. A good optic will result in a street light with even illumination and fewer dark spots, making it more effective at lighting up the road and improving safety for drivers and pedestrians alike.

6. The housing

Housing is one of the essential parts of an LED street light. The housing protects the internals of the light from environmental conditions like dust, moisture, and extreme temperatures. Suitable accommodation will result in a street light built to last and withstand even the harshest conditions.
When choosing the house for your street light, there are a few things to consider. First, ensure the material is durable and can withstand the elements. Second, ensure the housing is sealed correctly to keep out dust and moisture. Third, choose the accommodation that comes with a warranty.
This will give you peace of mind knowing that if something goes wrong, you’ll be covered. When it comes to choosing the house for your LED street light, make sure to keep these things in mind. It’ll help you select a street light that’s built to last.

7. The wiring

Any electrical system’s wiring is essential, including LED street lights. Poorly done wiring can cause all sorts of problems, like short circuits, fires, and electrical shocks. Ensure your street lights are wired correctly using only high-quality wires and connectors.
Using lower-quality cables and connectors can save you money upfront, but it will cost you more in the long run when you have to replace them more often. In addition, poorly made wiring can be dangerous, so it’s always best to err on caution.
When it comes to street lights, you want to be sure they are safe and reliable, so make sure to use only the best materials for the job.

8. The controls

LED street lights are becoming increasingly popular due to their energy efficiency. However, one of the most valuable features of LED street lighting is the ability to control them remotely. Controls allow you to dim the lights during certain times or turn them off completely when they’re not needed.
This can save a significant amount of energy, as well as money. A sound control system will give you complete control over your streetlights and allow you to make changes quickly and easily.
In addition, it’s essential to choose a system that is compatible with your specific type of LED street lighting. With so many options on the market, there’s no reason not to take advantage of this helpful technology.

9. The installation

LED street lights are becoming increasingly popular as an energy-saving alternative to traditional street lights. However, poorly installed LED street lights can cause problems, including uneven illumination, flickering, and premature failure.
To ensure your streetlights are installed correctly, it is essential to use only qualified professionals who have experience with LEDs. With proper installation, LED street lights can provide years of reliable service with minimal maintenance.

10. The maintenance

Like any other type of lighting, LED street lights require regular maintenance to ensure they stay in top working condition. This includes cleaning debris from lenses, replacing burned-out street lights LED, and checking drivers for proper operation.
Properly maintaining your streetlights will extend their lifespan and ensure they’re always shining bright. Streetlights are a crucial part of any community, providing safety and security for residents and businesses.
But they can quickly become a liability if they’re not properly maintained. That’s why it’s essential to have a plan in place for regularly inspecting and servicing your streetlights. Doing so can avoid costly repairs and ensure your community stays safe and well-lit.

Conclusion:

While many factors can affect the quality of outdoor LED street lights, these are 10 of the most important ones to consider. If you’re looking for high-quality LED street lights, consider all of these factors before making your purchase. And if you need help installing or maintaining your streetlights, be sure to contact a qualified professional with LEDs experience. Thanks for reading!

What Are The Factors Affecting The Quality Of LED Street Lights?最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

Introduction:

LED street lights outdoor are now the most popular choice for road lighting, thanks to the rapid advancement of LED technology. They use less power than normal street lights, are brighter, and last longer. So LED street lighting has been widely used in the lighting industry. After many years of technology accumulation, LED street lighting is now mature. But many users complain that LED street lights can be difficult to use. Sometimes LED street lamps flicker when we walk on the streets at night. This causes poor lighting effects. Why do LED street lights flicker? In this article, we will discuss the causes and solutions together.

Why do LED street lights flicker?

Flickering refers to the rapid and repeated change in brilliance over time of light. Actually, flickering can occur with almost all lights, including LEDs, halogens, and incandescent. Each light has a different effect. In incandescent and halogen lamps, for example, the filament temperature reacts slowly with changes in current. Therefore, flickering isn’t noticed. The LED lights react quickly to current changes so that the flickering will be more obvious. Flickering street lights irritate the eyes and alter the lighting effect. So why do LED street lights flicker? There must be several reasons for this.

1. LED driver power supply

A constant current power supply is the most common power source for LED street lights. The constant current power supply works in a basic mode. It adjusts the output voltage continuously to ensure constant current when the internal resistance of the LED lamp beads changes. Once this limit is exceeded, the power supply enters the protection state. This is where the lamp started to flicker.

2. LED light beads

LED beads are also a cause that should be considered. A mismatch between the LED beads and the LED driver power supply can be a nuisance. This can cause LED street lights to flicker. If the current is too strong for the lamp bead to withstand, the light will light up, and the other light will go out. If the power of a lamp bead chip does not suffice, the phenomenon of frequent flashing will occur.

3. Connections or circuits

LED street lights can flicker when there are loose connections or circuits. Poor placement of fixtures at the connection point could cause this. If multiple lights flicker simultaneously, it could indicate a problem with the junction point or panel. This could mean the junction point is loose and needs to be tightened.

4. LED bulbs or fixtures

LED technology is very mature and has been used in many street lighting applications. However, this does not mean that all LED lights are long-lasting and durable. If you choose a cheaper product, the quality may not satisfy you. Cheap LED street light bulbs may cause a range of problems for you. Low-quality LED bulbs with low-quality drivers are more susceptible to flickering problems than high-quality ones. High-quality bulbs will cost more but are cheaper in the long term.

5. Waterproofing

Another easily overlooked issue is waterproofing. LED street lights flicker can be attributed to the fact that the lamp was not waterproof. If the lamp bead is broken or the power supply is damaged, it can cause flickering and should be fixed immediately.

6. Power wattage

Your LED street lamp’s power wattage can affect how it functions, especially for cheap drivers. An appliance with a high-power load connects to your LED lamp’s circuit. Better drivers will normalize the output of the LEDs. Others may not. Drivers can be damaged and eventually fail if they are subject to repeated surges.

7. Dimmers

Placing the LED lights in a circuit with incompatible dimmer switches will also cause flicker problems. Dimmer switches work in a way that the power to the bulbs is turned on and off multiple times per second. This mechanism is not compatible with LED lights. So if they are combined, the lights will flicker.

Solutions for flickering LED street lights

LED street lighting, like all new technologies, is not without its challenges, such as the problem of flickering lights. Although flicker problems are normal, they can have a harmful effect over time. Street lights are the main source of outdoor lighting. Poor lighting conditions can be dangerous for the eyes and body. This also can lead to insomnia and other conditions for the surrounding residents. This issue should be addressed. Here are some methods to help you get started.

The first thing that should be determined is whether the flicker in the LED street lamp is caused by the driver power supply or the LED beads. If there is a problem, you need to replace them. Sometimes the fault will cause the street lamp to flicker even after it has been turned off. You should examine the problem to determine if it is a problem with the line. This should be addressed immediately to prevent any safety incidents. The LED street lights may produce a self-induced current if the circuit inspection finds no problems. The problem can be fixed by connecting the relay to the coil and the lamp in series.

How to avoid flickering led street light problems?

• Choose better LED drivers

Constant drivers can reduce power current peaking, which eliminates flickering. Choose a lamp that has a suitable drive element to isolate the noise and stabilize the power supply.

• Choose high-quality LED bulbs or fixtures

Be aware that cheap is not good enough. Choose better quality products that will benefit you in the long run. Although LED flicker might seem minor, many LED street light manufacturers are aware of this and working to create warm and flicker-free LED lighting. Therefore, it is important to choose a reliable manufacturer of outdoor LED street lights. They will assist you in selecting the best fit for your outdoor lighting requirements.

• Check the voltage issue

Don’t forget to address voltage variations. This can be done during wiring. Voltage change can occur due to multiple LED street lights being used simultaneously. This can cause your LED light to flicker. To avoid flickering, you should ensure that the current is sufficient to power all.

Conclusion:

After reading this blog, do you already know about the knowledge of flickering street lights LED? Stable LED street lighting is essential for night lighting. And any number of quality issues with LED street lights can lead to a lackluster lighting effect and a lot more trouble for future maintenance and replacement. Therefore, choose a company that provides high-quality LED lighting fixtures. In addition to this, regular maintenance and inspection are a must. In the event of any problems, be sure to seek the help of a professional or your manufacturer.

Why Do LED Street Lights Flicker? Solutions for flickering LED street lights最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

For the industrial led lighting products,

We have seen that Meanwell driver is the most common led driver for the China manufacturer, especially for the power consumption more than 100W. For example, led high bay lights , led high mast lighting, led flood lights and led street light.  And the popular items used on these products are HLG series, HBG series ( used on the led low bay) . According to the most clients’ feedback, the defected rate is very low if the products used Meanwell driver.

But for the power consumption lower than 100W, most China factories will choose the domestic brand driver, why?

• In order to get a more competitive price.
• The technology and quality for these brands are already very stable under 100W.

Therefore, usually, they will use the brand like Songsheng, Moso, Inventronics, Lifund  or Kaisheng, etc. And again, don’t worry about the quality, the market and the result already told you the truth.

However, with the competition growing on the led market, more and more clients are requesting a better price, so they start to test the higher power from these brands. And so far, we haven’t heard the massive defected rate from any brands.

So, if your clients are requesting a lower price, perhaps, you can try China mainland brands driver, starting with small quantity at first.

For the commercial led lighting products

The power consumption of commercial led lighting products usually is under 50W, and the products include T8 led tube, led panel light, led downlights, surface mounted led downlight, led ceiling spotlights etc.  So Meanwell is not the common driver in this market.  But some of the clients will have the demand to use LPF series Meanwell driver for the led panel light for the high class application.

Since the technology and the quality is very mature for these small power driver, so there are many brands in China mainland. Some of them are even producing by the small factories with poor quality, so, you need to pay more attention to ask the brand of the driver, and it is better to ask the sales to provide the related certification, such as TüV, CE or UL.

Here, we would like to list the most common brands for the commercial products for your reference, they are Lifund, Xiezhen, Eagle rise, Fahold, KG-power, Longood, etc. ( These brands didn’t pay any ads fee right there, so this is unbiased recommend, haha…)

Conclusion

Driver and the led component are the most important two parts for the led products. After reading above article, I think you already know how to talk with the sales for the driver in the future. But please note that led component  also plays a critical role in the led products, so, in the next article, we will write another article about the China mainland led component manufacturer.

Finally, if you like our articles, please share it with your friends.

Is Meanwell Driver the Best Driver for LED Street Light, High Mast Light ?最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

Don’t think that the ocean at night is only black and muddy and cannot be fished for production. In fact, thousands of years ago, fishermen knew that fish like light. The fishermen installed a barbed wire barrel on the outboard side of the ship and lit pine wood to lure fish. When the fish sees the fire, it will gather downstream of the fire. Now, with the development of wheeled fishing, electric lights have been used to lure fish. Due to the strong luminosity and ease of use, more significant effects are obtained.

Some fish have physiological habits that are slightly developed, just like the moth phenomenon we are very familiar with. Mainly small fish, such as whitebait, sardines and tuna. But don’t think these fish like any light. What they like is weak light. Therefore, under strong sunlight, they often sink to the bottom. On a bright moonlit night, they float on the water and swim toward the moon.

Some fish, such as mackerel and octopus, are susceptible to glare, because the bait they eat is small creatures that are phototaxis to low light such as moonlight and lights. These small creatures, such as krill and slender shrimp, sink to the bottom of the sea with the increasing sunlight in the morning, and then rise to the upper level of the water in the evening. These fish follow the bait creatures and move day and night, moving up and down.

Because the moonlight is bright at night, which is a few days before and after the first month of the lunar calendar, these condensing fish and small animals use moonlight as a light source. If you use light to attract them, the effect is not great, so fishermen often choose the moon. It often attracts fish in the dark and night to get a good harvest.

In addition, scientists also found that sardines, horse mackerel, etc., particularly like red light. If they are exposed to cyan and green light, their swimming will be very active. When using red light, the fish will be able to. The light source becomes denser and becomes very quiet. Therefore, when lights lure fish, some fishermen also install red light bulbs. When fish gather with white electric lights, the red light will light up, making the fish denser and quieter, which is good for catching the net.

LED lights can promote the growth of seedlings and fish

Irradiation with specific color light can indeed promote the growth of seedlings and fish. This research is based on the “Basic Research on Promoting Fish Growth with Specific Color Light” conducted by the team of Professor Akoyoshi Takahashi of Kitasato University, Japan, using a 50-ton tank Mass production experiment conducted.

The experiment started in July

2013. In addition to natural light during the day, the livestock star flounders were irradiated with green LED light for 7 hours. It was found that the body length of the star flounder with green LED light for 3 months grew from 10 cm to 18 cm, while the star flounder without LED light only grew to 16 cm during the same period. It can be seen that the green LED light can promote the growth of star flounder by more than 10%. At the same time, the weight of the plaice irradiated by natural light grew from 18 grams to 55 grams in 3 months, while the weight of the plaice irradiated with green LED light grew from 18 grams to 86 grams, and the weight of the plaice raised by natural light increased by 1.5. Times more. Before the mass production of livestock, the team also carried out seedling breeding in the spring. It was also found that the seedlings with green LED light grew from 4 cm to 8 cm in three months, while the ones that only used natural light. It takes 4 months for the seedlings to grow to 8 cm. In addition, the team also found that in addition to star flounders, the use of LED lights can also promote the growth of other fish species, but the suitable color light for different fish species is different, and the team is further researching.

What LED fishing light color is best for fishing?

The consensus tends to indicate that green and white lights will attract the most bait fish at night. Green ha the shortest wavelength and is the best color for penetration in fresh water lakes and other inter coastal waterways. In areas with poor visibility, green will also make the water appear cleaner and reflect less particulate.

Please note. Be careful if you are using both interior and exterior LED lighting for your boat. If you decide to put green and white LED lights within the interior of your vessel you will have thousands of bugs swarming you in seconds. I personally prefer to have green and white LED’s placed on the exterior of my boat, slightly submerged. This not only helps attract more bait fish but also helps with overall visibility and keeps the bugs out of the boat. Red works best for interior lighting.

Also, make sure you boat is anchored when you begin to fish. This will allow the bait fish to stay close to the submerged LED lights. If the boat is moving the fish won’t be able to keep up, and you’ll lose a significant amount of the bait fish in the process.

Why are led fishing light green?

The biggest reason people choose green lighting for their docks is because green light travels through the water better than many other colors, revealing both the abundant bait fish and the hungry thieves that move in to feast on them.

Green light also helps promote zooplankton growth in the waters around your dock. In turn, this attracts the bait fish, the hungry little fish who find zooplankton to be a delectable dining experience. Then, larger fish are attracted to dine on the bait fish which promotes fishing and viewing near your dock.

Will LED lights help me attract bait fish around my boat?

The quick answer is yes. LED boat lights are proven to attract swarms of bait fish and insects around the hull of the boat. As mentioned above, using white or green lights slightly submerged (about 3-6 inches) will generate a ton of bait fish activity.

Green LED lights have one of the shortest wavelengths in the color spectrum, meaning that it will penetrate further through the water before it scatters. In turn, zooplankton is attracted to this green light and will quickly swim to the surface to pursue the light source. Bait fish such as shrimp and squid will chase the zooplankton to the surface. Then, the predatory game fish that we’re after follow in pursuit. The LEDs set off a food chain reaction which delivers game fish right to the boat.

Why do fishermen generally go for fishing at night?

There are several reasons why some fishermen prefer fishing at night. Oftentimes it depends on the environment, the fish they are trying to catch, or simply the time they have available. One major reason why some anglers prefer night fishing is that there is less competition.

Our LED Fishing Light: 500W LED Fishing Light / 300W LED Fishing Light

LED Fishing Light for Phototaxis Fish最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

It’s not surprising that the demand for renewable energy solutions has driven a productive competition over street light manufacturers. Now, you can find tons of retrofit LED fixtures that can significantly lower your operating costs from existing lighting infrastructures.

When you choose to go solar for your outdoor lights, not only can you cancel out your electric bills, but also prolong your fixture life by 3 to 5 times. You can also reduce the frequency of light replacements and eliminate a large portion of maintenance costs each year.

This 2020, if you’re looking for cost-effective alternatives to run your outdoor lighting system, be it to retrofit or replace existing fixtures, you’ve landed on the right page.

As there’s no one-size-fits-all in street lighting, we’ll discuss the different options available for retrofits or replacements. We’ll also present some of the ways you can efficiently retrofit your street light system that can earn you potential savings in the future and lower carbon footprint.

Latest Solar LED Street Lights Best for Retrofits

Here are some of the modernized types of solar LED street lights you can choose from.

1. All-in-One/Integrated Solar Street Light

An All-in-One Solar Street Light is a compact and lightweight lighting fixture for environmentally-friendly outdoor lighting. This solar lighting solution has a modular design and mounts a battery, controller, LED lamp and solar panel in its housing.

A Series All in One Solar Street Light

Integrated street lights are generally easy to maintain, operate and install. These are the perfect outdoor lights for roadway lighting, line streets, parking lots, school and building perimeters and alleys.

All-in-one solar LED street lights typically come in 15W to 600W. Mounting height will vary depending on the application.

New models, especially the ones offered by Greentech Lighting, have remote management and control, auto dimming and brightness and online back-end solutions. These features make it easier to significantly reduce maintenance cost that is convenient for the street light owner.

Solar LED Parking Lot Fixtures and Retrofits

Here are some exterior lighting fixtures that can be replaced with smart integrated solar street lights:

Metal Halide/HPS/LPS Roadway Lights to Solar LED Roadway Light Conversion

2. Solar Powered Billboard Light

Solar LED billboard lights are the best alternative and replacement for uplights and existing billboard light fixtures. These are also the perfect lighting solution for areas where there’s no access to electricity. In many cases, existing metal halide/HPS billboard fixtures can range from 400W to 1000W.

Metal Halide/HPS Billboard Lights to Solar LED Billboard Light Conversion

3. Solar Flood Light/Wall Packs

Floor lights are used to illuminate its immediate perimeter like a facility, courtyard or around a factory. They are also great for advertising billboard, pathway lights or doorways.

Regular Street Lamps for Flood Lights

Regular flood lights usually have sodium vapor (LPS) for illumination. That is why they project yellow to orange lighting. Low pressure sodium vapor emits monochromatic colors that render vibrance quite poorly, but have an acceptable energy efficiency.

Rarely are regular incandescent bulbs seen for outdoor lighting. They are inexpensive upfront, but they waste a lot of energy and their lifespan is fairly short. You may also notice mercury vapor lights used for floodlights.

LED Retrofit for Flood Lights

Even though there are a lot of street light bulb options, there’https://www.chinastreetlight.com/collections/led-street-lights nothing more comparable to the capabilities of LED lighting for street lights. They are the most energy efficient compared with other types of light for solar flood lights, with less maintenance. Plus, they are environmentally-friendly and cost less in many years.

Mercury Vapor/LPS Flood Light to Solar LED Flood Light Conversion

Now let’s see your options for a solar LED flood light retrofit.

Typical Flood Light/Wall Pack Lamp	Recommended LED Lumens	Retrofit LED Light SpecsSolar Flood Light
25 Watts HPS/MH	1,600 lumens	10 Watts
35 Watt HPS/MH	2,400 lumens	15 Watts

4. Solar Garden Light

Garden lamps are usually only 2.5m to 5m. For lawns, lawn lamps are usually 0.6m to 0.8m tall. There are many types of outdoor courtyard light for gardens. The most common ones are usually mercury vapor or LPS, but some have incandescent bulbs.

If you are looking for budget-wise replacements for old garden light fixtures, an LED retrofit is the best option. Aside from rendering effective lighting and color hues, they also add style to your garden or backyard.

Solar powered garden lights and yard lights are also easy to install and set up compared with traditional lights. They do not need to connect to any electrical power source as they are powered by the sun. You can also enjoy less maintenance and less operation costs.

Incandescent/Halogen/Mercury Vapor/LPS Garden Light to Solar LED Garden/Lawn Light Conversion

Typical Garden Light	Recommended LED Lumens	Retrofit Solar LED Light Specssolar garden light
30 Watts Halogen	600-720LM	6 Watts
50 Watt Halogen	1220-1440LM	9 Watts
75 Watt Halogen	1500-1800LM	12 Watts

5. Solar Bollard Lights

Bollards are usually only 0.6m to 1m in height. They decoratively line walkways and pathways and are effective for ground illumination with minimal visual clutter. Applications may range from pedestrian pathways, storefronts, schools, homes to public parks.

Solar LED bollards stand way better than the typical bollard light. You can effectively use them to replace your existing bollards as they also present cheaper operation and maintenance cost for the long run. There are also no electrical costs, carbon emissions and they are very easy to install.

Incandescent/Halogen/Mercury Vapor/LPS Bollard Light to Solar LED Bollard Light Conversion

Let’s take a look at your options for solar bollard lighting.

Typical Bollard Light	Recommended LED Lumens	Retrofit LED Light Specs
25 Watts Incandescent	215 lumens	4 Watts

3 Ways to Convert to Solar Street Light Retrofit Systems

If you really want to switch into greener alternatives for street lights, here are some of the specific ways you can retrofit your street light system

1. Turn Existing Street Light Systems Into Solar Grid-tied Lighting Systems

If you do not want to purchase new lighting fixtures to replace existing installations, you can opt for solar panel connections for your grid-tied street lights.

The solar panels will effectively feed energy to the grid during daytime and in return, you can monetize and earn from the power you contribute to the grid.

For the size of your solar panel, it will depend on the amount of power you want to generate and contribute to the grid. For the street light lamp, make sure you also opt for an LED fixture so you can further maximize your potential savings.

2. Completely Replace Your Existing Street Lights with Solar Street Lights

Another method of reducing costs through street light retrofit is to replace your existing fixture with solar-powered street lights.

The great thing about this is you get free energy as you do not need to connect to the grid. They are off-grid solutions and it would only require you to find a reliable solar street light manufacturer to supply your street lighting needs.

3. Intertie Existing Street Lights with Battery Backup Systems

It’s a win-win solution for you if you opt for a grid-tied solar street light with battery backup systems. At first, you need to choose which type of battery is best for your location, weather profile and application.

In many cases, those of lithium ion battery types are the best for solar street light systems, although there are other affordable options.

With a battery backup, you can save on electricity costs by utilizing it only at specific times in the night. It’s also the perfect solution if your area experiences frequent power outages. When the battery gets drained, the street light will automatically connect to the grid.

To Wrap Up

We hope that this article has given you tons of ideas on how you can effectively retrofit your street lighting system.

To reiterate, solar street lights are the best type of street lights for retrofits and replacements of existing fixtures. It only takes the right type of solar street light and the right lighting method or system to maximize your savings.

Greentech Lighting is a solar street light manufacturer with thousands of street lighting projects completed. We are happy to offer our assistance in your solar lighting needs. Please contact us if you have further questions or would want to request a quotation for your solar street light project.

Which Type of Street Lights is the Best for Your Retrofit Project?最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

Many manufacturers use either term to name their products. Are these two terms identical?
No, they’re different types of lighting. Although both roadway and street lighting is designed to provide accurate and comfortable visibility at night of possible hazards in an adequate period of time to allow appropriate action. The primary purpose of roadway lighting is to help vehicle drivers remain on the roadway and give assistance with the detection of obstacles within and beyond the range of the vehicles headlights. Roadway Lighting is designed for freeways, express ways, limited access roadways, and roads on which pedestrians, cyclists, and parked vehicles are typically not present. Roadway lighting luminaires emanate a range of symmetric and asymmetric distributions. A freeway is a divided highway with full control of access. An expressway is a divided highway with partial control of access.

Street lighting is used to illuminate major, collector, and local roads were pedestrians and cyclists are often present. The principal intent behind street lighting is to help vehicle drivers recognize obstacles, provide the necessary visibility of pedestrians and cyclists, and aid in visual search tasks, both on and alongside the street. Such roadways serves as the principal network for through-traffic flow, service traffic between major and local streets, allow direct access to residential, commercial, industrial, or other abutting property, and give access for pedestrian traffic, etc.

Do not mix roadway lighting with street lighting otherwise your client’s lighting designer will be confused as they mean different lighting applications.

When Road Illumination Began: When Were Street Lights Invented?

Outdoor lights evolved from a dramatic, deep-rooted history. It later carved its way into the makings of the automatic solar LED lighting today.

A Street Light is used, not just for keeping the public safe in the dark, but also for heightening moods in romantic movie scenes. Ever wonder who invented the street light, when was it invented and how this lighting technology developed through the years?

In this article, we’re not only going to look into the earliest origins of a street light. We’ll also look at its present-day development into what is known today as an integrated solar street light.

Earliest Recorded Origins of Street Lights

Light has always been a major necessity thousands of years ago. Some say it dawned earlier than what is officially recorded.

The earliest remains of its historical existence was in 400 BC in Antioch. This was the time in Ancient Rome and Greece, where people used street lamps primarily for security. One is for preventing people from tripping over stones and another is for discouraging robbery activities. Oil lamps were usually placed in front of every villa.deep-rooted history. It later carved its way into the makings of the automatic solar LED lighting today.

Slaves had to carry out the lighting and extinguishing of the lamps. They were also responsible for watching these lamps.

Street Lights in the Pre-Industrial Era

In the 5th century BC, people in Peking (Beijing) used bamboo pipes to harness and lead natural gas from volcano leaks to their communities. Then they used this natural gas as fuel to ignite lamps to lighten up the pathways at night.

Middle Ages

Goods made by hand was popularized in the Middle Ages. This is the time when automation and labor-saving techniques were out of the question.

Thus, street lighting was the painstaking responsibility of the lower class people or of the so called “link boys”.

Link boys were given torches for lighting. They’d round up the murky streets of the medieval period and escort people from one place to another.

First Public Street Lights

Getting warmer, 1417 marked the first organized public street lighting system in London. The Mayor of London, named Sir Henry Barton, ordered people to place oil lanterns outside their homes at night during the winter.

First Usage of Oil Candles for Street Lights

In 1745 to 1749, newly-improved oil lanterns were predominantly used in Paris and in 1757, it was first introduced in the USA by Benjamin Franklin.

Benjamin Franklin designed his own version of London’s glass globe and it was used as the first street lamps in the USA. His design simply involved an oil candle enclosed within a glass housing. The glass housing is made up of 4 flat glass panels. Crevices in the bottom admits the air into the housing and the pipe above the fixture emits the smoke.

First Gas Street Light System

Gas lighting involves directly using flame to produce light, which was risky and unsafe for the lives of many residents.

In 1802, William Murdoch invented the first coal-ignited gas lighting system, placed along the premises of the SoHo Foundry. 5 years after that, London was illuminated with the first gas-lit street light.

In 1803, Rhode Island installed its first row of gas-lit street lights. In 1820, Baltimore was the first US city to ever install gas-lit street lights.
First Electric Streetlights

In 1878, it was in Paris that the world’s first electric streetlight was invented.

Parishans replaced the old gas lanterns with the arc lamp or the “Yablochkov candles”. In 1881, 4,000 Yablochkov candles were installed.

Use of Incandescent Lamp in Street Lights

Arc lamps didn’t last long as they have flaws. One is that they produce high illumination and harsh light. Another is that they have shorter life spans. So incandescent bulbs replaced these arc lamps.

In 1879, Thomas Edison created and introduced the first carbon-thread incandescent lamp which was used as a lamp for street lights.

First Town to Use Electric Street Lights in USA

In 1880, Wabash, Indiana became the first town in the USA to use electric street lights.

Thomas Brush has invented an electric-powered street light called the “Brush lights”.

Thomas was also the founder of the General Electric company. In the Wabash County Courthouse today, you can still see a Brush Light displayed at the courthouse.

The first street light in Los Angeles was a 150 ft street light high mast and a power plant was built near it to provide its electricity.

It was also designed to resemble the moon and equal its illumination.

First Automatic Street Light

It was in March 2, 1949 that the first automatic street light was lit in New Milford, Connecticut, USA.

First Solar Street Lights

Digging further, an American inventor named Charles Fritts took credit in making the first solar cell and he is named the first inventor of solar lights. This was in the year 1883, when the solar cell can only reach a 1% efficiency. Today, solar panels can reach up to 22% efficiency.

Low-Pressure Sodium Lamp for Street Lights

In 1930, low-pressure sodium lamps were invented in Europe. Low pressure sodium lamps have an outer jacket, which can be removed. They also have vacuum layers for insulation. This way, the lamps can maintain high temperatures keeping the sodium in vapor form.

High-Pressure Sodium Lamps for Street Lights

It was in 1965 that high-pressure sodium (HID) lamps were used in street lights. These lamps provided more efficiency and good color rendition than low-pressure sodium lamps.There are still many HID lamps in existence today.

First Use LED Lamp for Street Lights

LED lamps are successors of the HID lamps used in street lights today. They produce far better illumination, with low energy usage than HID lights.

Currently, there are only a few street lights in the world that uses LED as its main light source. But the rate of adoption for this type of lighting is exponentially growing by the day.

Solar LED Street Lights Today

Today, there are hundreds of patented solar LED street lights, Mixed wind and solar street lights and solar powered street lights with CCTV camera. These solar street lights equipped with the most advanced technologies that ultimately saves more time, energy and money.

Wrapping Up

If you’re looking for solar street lights with cutting-edge, green lighting components, look no further. We provides this in the market in a variety of options.

Green Tech Lighting is a street light manufacturer offering the latest integrated solar lighting systems. We carry All-in-one solar street light, All-in-Two solar street light,  solar flood lighting, solar garden lighting and solar parking lot lighting. Feel free to contact us for quotations and for more questions.
Sources: Automatic Street Lights First Appear, Street Light.

Roadway Lighting, Street Lighting, are they the same thing? When Were Street Lights Invented?最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

Website SEO Address for LED Street Light, Solar Streetlight最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

You are at the right place!

Green Tech Lighting Highmast led lights provides optimum visibility without glare or shadows offering an enhanced player experience. Our floodlights ensure players perform at their best and reduce the risk of injury.

In addition, all our lighting systems meet the requirements of international sporting bodies.

Our led football light utilize the advanced technologies of Philips. We can provide a detailed site specific light design that maximises visibility, reduces glare and allows athletes to play better and play safer.

1000w LED high mast lights , it can replace 2000W~3000W metal halide light, it is one of the feature products of Green Tech Lighting, it features with high light efficiency, up to 150lm/w. It is widely used football pitch, stadium, tennis court , basket ball court and other sport field.
1000W High Mast LED Light Parameter

What’s The Lighting Requirement Of Football Stadium Lights?

1.Lux Level (Brightness)

First things we need know the Lux Level, Television or non TV broadcast?

The lux level standard is different between  Television or non TV broadcast competitions.

According to the FIFA’s stadium lighting guide,

the class V (i.e. international televised such as World Cup) football field has the highest standard level of 2400 lux (vertical – face of football players), and 3500 lux (horizontal – the turf).

If the football field is for community (recreational use), we need 200 lux level. The high school or college football club can have 500 lux.

2.Uniformity Standard

Another important parameter is lighting uniformity.

It is a scale from 0 to 1 (max) reflecting the distribution of lumen across the sports field.

It is the ratio of minimum illuminance to average illuminance (U1), or ratio of minimum to maximum (U2).

Hence, if the lux level is quite similar, says around 650 to 700 lux, the difference between minimum and maximum value is very small, and the uniformity will be closer to 1. The lighting uniformity of the FIFA standard football stadium is 0.7, which is relatively challenging in the sports lighting industry.

3.Beam angle

For the big football stadium, the poles always far away from the play pitch, so we need choose the best beam angle, we have 10°/45°/60°/90°beam angle option.

4.Color Temperature

The general color temperature requirement of football ground is larger than 4000K for all classes. But we usually use 5000-6000K color temperature to provide better illumination for the players and audience because these colors are more invigorating.

What’s The Most Easily Neglected Problem?

Artificial shadows on the pitch caused by floodlighting systems detract from visual clarity for both spectators and television broadcasters.

The shadows impinge upon the viewing experience and should be eliminated where possible or reduced to soft shadows.

During the pitch illuminance design process, it is important to evaluate the production of player shadows and eliminate any hard shadows. This will generally be done by using multiple light sources from various locations for each area of the pitch.

This will mean that shadows are reduced and players will benefit from good illuminance modelling around their entire bodies. This will be essential to provide the adequate vertical illuminance and uniformity on all planes.

The image above demonstrates the impact of player shadows on a football pitch.

In some stadiums, the existing infrastructure will mean that a four-corner tower/column floodlighting system is the only viable option in terms of the pitch lighting design. Corner tower illuminance systems will generally produce hard shadows, which will vary in different areas of the pitch. With this type of installation, it is not possible to produce consistently soft shadows.

The image above is an example of the soft shadows created by an effective solution involving multiple light sources from different locations.

The image above is an example of hard shadows in the goal area. Shadows should be reduced where possible, while ensuring that players are not hindered by discomfort glare.

Why Choose us ?

Green Tech produce LED flood light for football field from 500W-1000W. You can choose the power according to your needs.

1.Optical Technology

The most nature color with professional optical light distribution technology.

The most stable and accurate wavelength

The most efficient chips

With advanced calculus light distribution, controlling 98% light beam with pinpoint precision without creating glare or off-site spill

2. Cooling Technology

With 4D heat dissipation technology,

Junction temperature< 65℃, heat energy can be released quickly. 80% of others on the market junction temperature>100℃.

For the LED light, if junction temperature>70℃, lights decay fall so quick and affect the lifespan.

Apart from chip heat dissipation, we also ensure that each component’s temperature difference is <3%, thus ensuring LED life and overall performance. Our lifespan>80,000hours, if the lights working 5 hours per day, then can working for 43 years.

3. Anti-glare

Glare means the strong light that make the players or audience feel discomfort or even irritated. Especially for high power LED lights, if there is no special design on the LED chips, people may feel dazzling when looking at the lights. We have the patented design on the anti-glare lens that reduce the dazzling effect by 40%.

4. Flickering Free

This feature is important for professional sports courts that hold televised competition. Fluorescent and metal halide lights are susceptible to flickering under camera because of the brightness significantly fluctuate under low frequency. This greatly affect the user experience because of uneven brightness.

Nonetheless, the new generation LED lights are compatible to 6000 Hz slow motion camera and the fluctuation rate is less than 0.3% (based on maximum lumen).

5. Convenient maintenance

Have you ever worried that the lights will be installed in very high place, if they are unforeseeable damaged, how to maintain it or how to replace it?

Ours are patent signal module design, one LEDs failed won’t affect others. Instead of removing the entire light, we can just replace the broken unit (or module) by simple soldering.

6.  Avoid Spill Light (Especially for Residential Areas)

Light pollution affects the daily lives of surrounding residential areas, and the strong lights may also blur the vision of the road users nearby.

According to the international standard, the brightness of the spill light should not exceed 10 to 25 lux. By having the comprehensive lighting design, we can suppress the unwanted light in the greatest extent.

7. Special Consideration

One of our clients told us that there are many tiny birds nesting on the luminaries because of the warmth.

If the bird’s nest on the heat sink, and the temperature is too high, It’s easy to cause a fire!

Think about if the high mast light near the gas station, near the sea port, and a fire in a bird’s nest fall down, what will happened?

Our frame and heat sink of lights have special surface treatment, electrophoresis and dusting which have Insulation function.

8. Wind resistance

When we are designing the product, we are also considering the small wind resistance. In the current market, only a few company will think about this factor.

9. Free DIAlux simulation

We are not only provide the lights, also you can enjoy our free professional DIAlux simulation services.

We know that each ball field will have different lighting requirement such as the number of poles, height of poles, brightness lux requirement, anti-glare, flicker-free or other special lighting needs of outdoor or indoor sports court.

We can satisfy your needs because we can offer tailor-made LED lighting for the court for you without any additional cost.

10. Warranty

Before buying the LED lights, it is highly recommended to have a look at the warranty period. We provide 5 years warranty, any quality issue within 5 years, we will take care all the cost, including the shipping cost.

Application

Analysis 1000W High Mast LED Light for Football Stadium最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

We will analyze them one by one, so that you can understand the secret of led chip.

Epistar Chip

If the manufacture told you that the chip is from Epistar. Possibly, he was lying to you. Because they actually was using San’an. So, why the manufacture cheat their clients?

It is because most clients will think that Epistar chip is more reliable, but the truth is that San’an chip has the same quality as Epistar chip for general lighting. So, you don’t worry about the quality and stability. Actually, San’an is the biggest led chip manufacture in China mainland.

Cree and Nichia Chip

If the manufacture told that their products were using Cree ,  or Nichia chip, they are telling you the truth. You don’t need to doubt that, because the price of those chip are higher than others, and it is easy to buy these led. There is no need to cheat you.

Bridgelux Chip

This chip is more common on the COB, and it is a big brand from USA. There is only one thing you need to pay attention on Bridgelux.  When someone was telling that it is from Bridgelux chip, it is better that you ask him one more question. Is the package also by Bridgelux ? Because the price would be different if the package was doing by Bridgelux.

Philips Chip

Today, many many led manufacturers are using Philips 3030 SMD on their products, led Street Light, solar street light,  outdoor flood lights, led high bay lamp, high mast light, and other industrial lighting. And many big China package factories also produce this type of SMD with very reliable quality.

So, you can relax that if the manufactures told you that they are using Philips 3030 SMD.

San’an Chip

This  is the biggest Chip manufacturer in China mainland. If a salesman was telling you that they are using San’an chip, congratulation, you are meeting a honest man, and I think he is very confidence on the quality of their product. Just give him a chance and try their product.

Some of you will say, ok, now I already know about those chip after reading this article. But, how can I recognize the chip exactly ?

The best and the only reliable way is to send the sample to the original manufacturer, and asking them to help to check the authenticity. But this procedure will take you a long time, and not every company provide the service.

So, for the general lighting product, our suggestion is that just try to buy some samples to test, no matter what kinds of chip, the technology is already very mature. There is no need to pay much worry on that.

Top LED Chip Brands for Solar LED Street Light, High Mast Light最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

Or, you are upset about the short autonomy of your current solar street lights with traditional technology, which, sometimes, especially during monsoon, have to subsist on the national electricity grid?

(some hybrid solar street lights systems are grid-tied systems, they are designed to connect to the national electricity grid. When their own battery bank runs out of power, they will switch to the electricity grid.)However, things can be worse.

Your projects could be located in some remote rural areas or isolated islands, where no electricity can reach. How can your solar-powered street lights survive a spell of raining weather?

You may say we should increase the size of both battery bank and solar panels. Well, this sounds plausible in engineering respect, but when it comes to the project budget, this also means the raising of outlay significantly since the cost of battery accounts for a larger part.

Then, why not adopt the ones with advanced technology, all in one solar street lights.

Without further ado, let’s dive right in: Contents

• Chapter 1. What is all in one solar street lights?
  • The major modules
• Chapter 2. How does an all in one solar street light work?
• Chapter 3. Why should we use all in one solar street lights?
  • Why traditional solar street lights were not that popular?
  • New technologies are applied to solar street lights?
  • What can we benefit from the latest technology?
• Chapter 4. All in one solar street lights VS. Traditional solar street lights
• Chapter 5. How to get a qualified all in one solar street lights?
• Chapter 6. All in one solar street lights applications
• Chapter 7. how to design a project with all in one solar street lights(Case study)
• Conclusion

Chapter 1. What is all in one solar street lights?

All in one solar street lights are one type of integrated solar street lights, which integrates into a product the four main components: solar panel, light source, battery, solar energy cables, and solar controller. Now let’s go through the details of each module one by one

The major modules

# Monocrystalline Solar Panel

Monocrystalline and polycrystalline solar panels are two different solar panels which are widely applied in the solar industry.

Generally speaking, monocrystalline performs better than polycrystalline, especially in cold weather they have higher energy conversion rates than polycrystalline. To data, Sunpower monocrystalline solar panel can reach as much as 24.1% conversion rates.

So, Monocrystalline panels are installed in all in one solar street lights due to its limited size.

These solar panels act as the role of energy collecting and conversion, in the daytime, they collect energy from the sun and then convert them into electric power which will be stored in batteries as chemical energy.

# LED Light source

Suffice it to say, as light sources LEDs are prevailing among illuminating market, for its high performance in energy-saving. It definitely can be counted as a new generation of lighting solution.

LED types vary in size and watts, such as 3528, 3030, 5050, 5630, to adapt to different applications.

Our S2 series integrated solar street lights is with Philips LUXEON 3030 SMD, which has almost 190 lumens per watt. A LED module is formed by these single 3030 SMDs which are soldered to an aluminum substrate in advance.

Furthermore, an aluminum heatsink is always applied to the rear side of the led modules to help dissipate the heat generated by LEDs. This is very important, for although manufacturers claim that LED has a lifespan of more than 50,000 hours, its light depreciation can be abnormally high if it is working in a temperature larger than 70 Celsius. So we must make sure that the LED junction temperature is under 70 Celsius.

# Lithium-ion Battery

Rather than car batteries, which are designed to discharge a large amount of energy in a short period of time, renewable energy industries prefer deep-cycle batteries, for their excellent characteristics in the enduring power supply, deep discharges and far more cycle times, 3000 times, twice or three times more than that of car batteries.

Batteries cycle times is also affected by the depth of discharge(DoD), we will talk more in Chapter 5.

There are two main types of deep-cycle batteries existed in the solar battery market: lead acid and lithium.

Why do all in one solar street lights use lithium-ion battery?

5 Reasons:

Difference between them?

Lithium Iron Phosphate (LiFePO4) Battery (LEFT) VS Ternary Lithium Battery (RIGHT)

What kind of lithium-ion battery should I use in my projects?

What we have learned, from the comparison table above, is that LiFePO4 battery is more expensive, but its chemical substance inside is more stable, which makes it kind of high-temperature resistance, while ternary lithium battery is relatively low-temperature resistance, for its materials are more active and can work under 0 Celsius.

So, if your project is in the tropics, LiFePO4 battery is recommended. But if the project is in northern countries, we advise ternary lithium battery.

# MPPT Solar Charge Controller

There are 2 types of controller: PWM and MPPT in the market.

All in one solar led street lights adopts MPPT, for, in this case, PWM will waste some energy collected by panels, while MPPT can convert all the solar energy collected into chemical energy

As the main functional component, MPPT solar charge controllers have some basic functions as below

1. Dusk to dawn control

The controller is always monitoring the voltage of the solar panel, which increases or decreases with the intensity of the sunlight. When it is lower than 5v, towards dusk, the control will switch on the LED lights. And when it is towards daybreak and the voltage is larger than 5v, the LED lights will be turned off.

2. Time control

The solar controller can also control the power output according to the time schedule, for instance, you want

• 70 percent brightness from 6:00 pm to 7:00 pm,
• 100 percent from 8:00pm to 10:00pm,
• 30 percent from 11:00 pm to 5:00 am.

Commonly, a controller has around 5 time-slots you can use to set according to different requirements of projects.

Time control is often used in conjunction with motion sensor control. For example, from 11:00 pm to 5:00 am, there are few people on the road, so you can set only 30% power during this period, meanwhile, only capitalizing on the motion sensor to raise power to 100% when a passer-by is detected.

By doing this, we can save a lot of energy to boost the duration of off-grid solar street lights and ramp up the days of autonomy.

3. Motion sensor control

A controller can take action when it receives a signal from the motion sensor to increase LED brightness when someone is in sensor area, and then revert to the former level of brightness when it moves out of the area.

4. Preventing overcharge and Low voltage disconnect(LVD)

Either overcharge or over discharge can dramatically reduce the lifespan of batteries, although batteries modules themselves have this sort of protection, solar charge controllers usually have the same function analogous to that of battery modules. But be rest assured, the two are not conflicting with each other, for they function in different dimensions.

# Infrared(PIR) Motion sensor

Infrared and microwave motion sensor are two popular types in all in one integrated solar street lights, the infrared motion sensor detects heat source movement, while microwave ones send microwave radar and receive the bounced signals to analyze the changes in bounced signals.

Our all in one solar street lights incorporate infrared types, which have a 120-degree working angle and can detect a squat cone space under the lights.

We do not prefer microwave ones, although they have a larger working angle, they are rather too sensitive and more likely to respond to some wrong movements, such as swaying trees, fluttering birds and flapping flags. Those wrong response could consume lots of gratuitous battery energy, and that’s what we do not expect.

Above is the introduction of the primary components.

However, as integrated solar street lights, all in one solar street lights can also integrate some other functioning modules, such as Bluetooth, CCTV(Closed Circuit TV), or even wireless monitoring system, which enables end-users to monitor the status of each lights or even to control every lights by PC or mobile phone at any places where there are internet services.

Then, How do all these modules work as a complete system? We will talk about the working process in 2 aspects:

#Charging

Auto-charging during the day

First, the solar charge controller will turn off LED lights towards dawn once solar panel voltage rise to 5v, which is accounted for a little sunlight in the morning.

When there is enough sunshine during the day, the solar panel will work together with the solar charge controller to collect the solar energy.

Commonly, in a 12v solar system, with the effect of insolation, the voltage of its solar panel will rise to around 18v so as to charge the 12v battery bank. Meanwhile, the solar charge controller will prevent overcharge to protect the batteries.

LED turns on automatically at night

When there is not enough sunlight towards dusk and solar panel voltage drops to a value under 5v, the LEDs will be turned on accordingly.

“Time control mode” and “Motion sensor control mode” will be working during discharging at night.

As primary function, Time control is used to customize different brightness in different time slots. For example:

• Time slot 1: 6:00 pm – 7:00 pm, 50% brightness
• Time slot 2: 7:00 pm – 8:00 pm, 70% brightness
• Time slot 3: 8:00 pm – 10:00 pm, 100% brightness
• Time slot 4: 11:00 pm – 2:00 am, 50% brightness
• Time slot 5: 3:00 am – 5:00 am, 30% brightness and so on.

Motion sensor function

a motion sensor is used as a minor function which can be recognized as an energy-saving mode

The LEDs’ brightness will rise to 100% when someone is approaching the lights and then revert to the previous level of brightness 20 seconds after the man leaves.

Chapter 3. Why should we use all in one solar street lights?

Why traditional solar street lights were not that popular?

In the past, why people do not tend to choose solar-powered street lights is due to three major reasons,

1. Lighting bulbs are energy consuming

Both MH(metal halide) and HPS (high-pressure sodium), which were used as light source in streetlights at that time, are with the relatively obsolete lighting technology (60-80 lumens/w) compared with that of the LED. those bulbs/lamps usually require a large amount of energy per day from its battery bank, which is considered as a downright burden to its battery capacity.

2. The LED technology is newly-developed and pretty expensive

In those days, although LEDs had been on the market in commercial outdoor lighting for a few years, the technology was still not mature. Their lighting efficiency was only 100 lumens/watt (now, in 2019, it can be up to 200 lumens/watt). Furthermore, since LEDs were newly-developed at that time, the cost was rather expensive and the average man on the street could not afford to buy.

3. Lithium-ion battery technology is not well developed

The third reason is the solar battery. The lithium-ion battery has the longest lifespan as one kind of deep cycle batteries, but they were not stable and would fail to work under 0 Celsius. (now, the working temperature of ternary lithium battery: -30 to 65 Celsius)

However, Things have changed over years.

New technologies are applied to solar street lights?

The size of both batteries and lighting sources is increasingly small nowadays.

Thanks for the technological breakthrough in both the lithium-ion battery and LED lighting. These developments make it possible for the solar lighting industry to develop integrated solar street lights.

1. Battery Lead acid batteries VS. lithium-ion battery

Compared with lead acid batteries, lithium batteries are lighter, smaller, with longer lifespan and larger DoD, what is more important is that lithium batteries are with larger capacity at the same volume.

2. Light source

Compared with MH/HPS bulbs, LED takes up far less space in the lamps

What can we benefit from the latest technology?

1. No wiring, and easy to install within a few minutes

there is no complex wiring process, even if you are the end-users, you do not have to be with an engineering background or skills of setting electrical equipment, all you need to do is fixing the product with 12 pieces of fastening screws. Your family will stand to benefit from the free solar energy all the time.

2. 60% less energy consumption, which also means more days of autonomy

The light sources of most conventional solar street lights were Metal Halide(MH) or High-Pressure Sodium(HPS), which luminous efficacy is only 60-80 lumens per watt. However, nowadays, the cutting-edge LED lighting technology has dramatically boosted it up to about 200 lumens per watt. People can get the same brightness at night by consuming much less energy from solar batteries.

All in one solar street lights with this kind of light source easily realize 5+ days autonomy, making it possible to work normally in places with rainy seasons or less insolation.

3. Better hurricane/typhoon resistance ability

All in one integrated solar street lights are designed with compact structure, compared with that of split-types, which solar panel are separated from the lamp. This kind of structure has better performance in withstanding hurricane/typhoon.

Split-type solar street light will not withstand such inclement weather since its separated solar panels are more likely to be shredded by storms.

4. Lower transportation cost benefits from compact structure and all-in-one design

If you are a businessman, compact design means a lot to your profit margin.

The whole container loads of solar street lights could be twice or even three times more than before, in the meantime, the rent of the warehouse can cost much less than before.

Besides, due to the convenience of installation, which we talked in #1, your company will save even more local labor costs.And more…

Chapter 4. All in one solar street lights VS. Traditional solar street lights

Conventional solar street lights VS all in one solar led street lights

In this chapter, we will go through a concrete example by presenting a comparison table between them, so you can figure out the pros and cons more easily.

the same brightness, working hours, and days of autonomy,

But it is obvious, the upfront cost of all in one solar led street lights is fairly low,

it only needs 27Ah battery and 50 watts solar panel, whereas traditional solar street lights require 156 Ah and 280 watts, let alone other extra wiring costs that are entailed in installation.

Chapter 5. How to get a qualified all in one solar street lights?

needless to say, the quality of products is very important to businesses, sometimes, is crucial for winning tenders.

But can you always get a qualified all in one solar street light? I doubt it.

You might encounter problems:

For almost all kinds of integrated solar street lights,  QC mainly focuses on the following items:

• CCT & CRI
• LM80 standard
• Battery cycle times
• 3 transportation testing for lithium batteries
• Ingress Protection standard
• Working temperature

Let’s review each one in detail.

CCT & CRI

CCT & CRI are important optical factors for illuminating

CCT stands for correlated color temperature.  lower value tends to yellow, while larger value tends to white and even with a little blueish color, refer to 8000K in the picture.

3000K looks like the sunlight at dusk or daybreak, the sunlight at noon is around 5000K, 6500K is called natural white, compact fluorescent lamp commonly has 6000-7000K.

Nowadays, nature white(6000-7000K) is always using in solar street lights.

Color rendering index (CRI) indicates how well a light source allows the substance to reflect its real color, the higher the CRI, the more an object can reflect its real color under this light source. Refer to the CRI 80 VS CRI 90

However, larger CRI also means more brightness loss as compensation. Namely, when we use the same chips to produce LED, if we make it with higher CRI, its brightness will be relatively dimmer than the one with lower CRI, so we commonly apply CRI 70 to the solar street light industry to get somewhat equilibrium.

Method

With the help of the integrating sphere, we can easily get the two optical parameters when inspecting the incoming raw materials. In fact, integrating sphere can also help to get even more electrical parameters, such as illuminance(brightness), lighting efficacy and so on.

LM80 Standard

TYPICAL LM-80 DATA UP TO 10,000 HOURS, Source: Lumileds

LM80 is related to the lumen maintenance of LED, this standard requires the LED to meet the following table

Working time(hours)	brightness depreciation(%)
1,000	0
3,000	<1%
10,000	<3%
50,000	<30%

Since human eyes will not perceive the depreciation until it drops to 30%, an LM80 certified LED can definitely walk you through 50, 000 hours without becoming dim sensorily

Method：

Some types of equipment are specially designed to do this test accordingly, although it is very expensive.

If you do not want to invest such huge and expensive facilities, our advice is to complete the job in a third party laboratory with little payment.

Battery cycle time

DoD vs. Cycle times

Battery seems to be the most vulnerable part, they have the higher failure rates than the others, its lifespan depends on not only the materials and workmanship but also how we use it, for examples, how many proportions of power is discharged before next charging, specifically, the depth of discharge (DoD)

In solar street lights systems, the larger proportion the batteries are discharged every day, the shorter its cycle times will be.

Batteries manufacturers declare the cycle times of their lithium battery to be 1000 – 1500 times, which is based on the scenario that the battery is almost fully discharged each time.

However, we need to verify this data by ourselves so as to be responsible for the quality

Method

Use an instrument like this one can help to record the testing data automatically, some of them have UPS(Uninterrupted Power Supply) function to guarantee a complete testing process and the data integrity.

UN38.3 transportation testing for lithium batteries

UN38.3 is for the safety of transportation of batteries or products with batteries, it includes 8 test items

1. Altitude Simulation
2. Thermal Test
3. Vibration
4. Shock
5. External Short Circuit
6. Impact
7. Overcharge
8. Forced Discharge

Over those procedures, UN38.8 requires there is no leakage, no venting, no disassembly, no rupture, and no fire.

These are more extreme test conditions compared with normal working conditions, products which have passed UN38.3 are definitely able to perform better.

Ingress Protection standard

All in one integrated solar street lights are outdoor lighting, so they have to withstand a hostile environment where they may fail to work because of dust or rainfall.

Ingress Protection(IP) rating is used to define the grades of resistance against dust and water.

Outdoor lighting fixtures are usually with an IP65 rating, which is the highest protection level for outdoor luminaire except for underwater luminaire. The first digit 6 is for dust and the second digit 5 is for water.

Though there is waterproof seals set between the enclosure over the final assembly, those interior components themselves are watertight too. For instance, the wiring connectors are all waterproof, and the controller is IP67 rating.

Method

IP65 testing equipment

Apparently, referring to the picture above, a mimic raining environment is necessary for final testing, and it is more useful during the stage of design or pilot production.

If you do not have a spacious site for this kind of voluminous facility, we also suggest seeking a third party laboratory to help you with this work.

Working Temperature

Outdoor temperature varies with location or season, the working temperature will directly affect the performance of each component or even lifespan in some extreme situations. So either respective modules or assembled products needs testing and monitoring.

Engineering and QC take in charge of these jobs in a factory, when:

1. new product design,
2. pilot production,
3. raw material changes,

As with others, these processes also rely on special tools.

Method

The equipment is used to imitate various working environments to test the tolerance of electronic products. The technician can also set worse working temperature than a real condition to check whether the electronic modules could survive from the testing.

Chapter 6. All in one solar street lights applications

These sites are generally classified into four different areas as below:

1. Roadways

Fixtures: roadway lighting, street lighting

Locations: highway, road, motorway, lane,

Roadways represent a variety of ways for vehicle traffic. These ways require narrow beam angle across the road and wide beam angle along the road, for this can increase pole spacings and reduce the numbers of streetlights on it.

Recommend :

Type II, Type III

2. Open Areas

Fixtures: parking lot lighting, park lighting, playground lighting, airport lighting, outdoor security lighting(sometimes with cameras)

Locations: airport, park, garden, parking lot, playground, tennis court, outdoor basketball court, intersections

Open Areas often connect vehicle traffic to pedestrian traffic, including the locations with public activities, such as the park, garden, and the places where security monitoring is always processing, such as parking lot, intersections.

these areas need illumination solution at night for either human activities or the scrutiny of the safety and security.

Recommend light distribution types:

Type II, Type III, Type V,

3. Pedestrian Areas

Fixtures: pathway lighting

Locations: plazas, courtyards, and pathways

Pedestrian areas indicate the transition between the building and its surrounding sites since these transition areas cover irregularly shaped spaces, more lighting distribution types may require for this kind of projects.

Recommend light distribution types:

Type II, Type III, Type IV, Type V,

4. Site Perimeter

Fixtures: Perimeter lighting, site lighting,

Locations: factory perimeter, industrial zone perimeter

Some sites, for instance, your villa, require illumination around its perimeter and exclude illumination onto the site itself, for at night you do not expect the street light trespass on your private space, especially bedroom.

Recommend light distribution types:<

Type II, Type III, Type IV,

Type II lens for all in one integrated solar street lights

In the MH/HPS ages, this kind of lighting bulbs have to rely on reflector cup to shape special light distribution types on the ground, those cups usually installed above the bulbs, this is another reason why old street lights are too big to be integrated.

Whereas in LED ages, engineers only need to have a thin lens installed onto the LED to realize various light distribution types.

Chapter 7. how to design a project with all in one solar street lights(Case study)

Here is a real-life inquiry from Oman.

First email

Since there is lack of detailed information for designing a project, so we ask for more information, and the customer sends them in attachments

Second email

We spent some time to study and organize the information from the emails

At last, the customer’s requirements are listed below

1. 100w rated wattage, all in one solar led street lights for a roadway project
2. The road is 12-meter width
3. Mounting height 10 meters
4. minimum required illumination level at the ground: 5 lux
5. 12 hours/day, full power operation
6. 5 days of autonomy
7. materials are suitable for continuous 55 Celsius (the testing method is in Chapter 5)
8. IP65 waterproof.

The engineering process started firstly from checking the existed IES files to guarantee the 5 lux optical requirement on the ground

let’s go through the steps one by one.

design a project with all in one solar street lights

Step 1: check IES datasheet

Our 100w happens to be tested at the mounting height 10 m ( MH = 10 m), and it central illuminance can reach around 8 lux,

(tips: if the mounting height is 7 meters in your project, you need to multiply factor 2.041 in the right column to get relevant lux data on the ground)

Step 2: adjust the distance between the poles

After adjustment

In the course of simulation of engineering, IES files and Dialux can help engineers to get appropriate pole distance pretty easily.

process?

1. load the 100w IES file into software Dialux
2. Set the pole position: both sides or only one side?. (in this case, only one side installation is allowed)
3. Input basic parameters: road width, mounting height, preliminary pole distance, and the number of lamps per pole.
4. Try a different value of pole distance on the basis of using minimum streetlights, until you get “minimum 5 lux on the ground”

In the end, we decide 25 meters is the best pole distance. And at this time, the minimum illuminance is about 7 lux.

Step 3. Calculate the battery size

So far, optical parameters and installation positions have all been determined.

Next, we need to size the solar battery according to requirements, 12 hours/day and 5 days backup

1. The LED modules in this 100w model require working current 1.34A.
2. 12 hours full power operation consumes battery power 1.34A x 12H = 16.08AH
3. for 5 days backup, we need (16.08AH x 5 = 80.4 AH)
4. So we select an existed battery size: 84AH for this model.

Step 4. Calculate the solar panel size

The final step is to size the solar panel according to battery size 84AH and the peak sun hours

1. The solar irradiance in Sultanate of Oman is sufficient, its peak sun hours is about 6.5 hours
2. 84AH / 6.5 = 12.92 A, so we need 12.92A current from solar panel for 6.5 hours
3. For LifePO4 lithium battery, the charging voltage is 18v
4. 18V x 12.92A = 232.62 W, that means we need about 230 w energy from solar panel per day theoretically
5.  Since the battery is not always totally empty, so we usually multiply a coefficient, 0.7
6. 232.62 W x 0.7 = 162.84 W

Our 100w model is equipped with a 170w monocrystalline solar panel.

So, finally, we prepare the products with recommended parameters as below

Conclusion

All in one solar street lights is a new trendy type of solar street lights, And this trend will be strengthened as the development of sodium-ion batteries, which is even powerful than current lithium-ion batteries.

Although it may take some time for sodium-ion batteries to go out from the laboratory to real-world applications, it is worth expecting. And at that time, solar street lights will be powerful enough to replace all streetlights.

• 170W monocrystalline solar panel
• 84AH LifePO4 lithium battery
• 100w rated LED model
• 10 000 lumen
• P65.

Guide of All in One Solar LED Street Lights(Updated in 2022)最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

You are having the lights project available, or finding the tender that is related to your company. Exactly how can I select the best outdoor LED flood lights from the best manufacturer?

There are several substandard goods in the market, how can I determine them? Since CFL and halogen lights are going to be banned in Europe, it is high time to replace the typical lights such as steel halide, HPS, LPS as well as halogen with LED flood light.

And you will certainly see majority of the lighting tender includes LED substitute. LED is currently extensively used in our daily lives, such as outdoor sporting activities field lighting, storage facility lighting, road & tunnel lighting, and so on.

How to choose the best LED flood light manufacturer? Experienced manufacturer

Experience is one of the most straightforward proof of whether a manufacturer is qualified or not.

However at the same time, possibilities are that a few of them may give false claim.

To check the year of establishment of a LED business, we can look in the authoritative site.

For instance, if you are acquiring the flooding lights from Chinese factories, one of the method is that you can enter into alibaba.com web page to see how old this distributor is.

But if you cannot can that company listed on Alibaba, it doesn’t mean that it is not qualified manufactures.

Because for some professionals companies, they are not counting on Alibaba, they have their ways to promote their products, such as SEO, google, blog, forum, etc.

Warranty of LED flood lights

Apart from looking at how many years of service warranty can they supply, we also need to be careful of if they genuinely supply the support within the warranty duration.

In fact, there are numerous suppliers that shirk their duties to the customers, such as incorrect setup, wrong places and etc.

Nonetheless, we provide prompt assistance to the consumers within or perhaps outside the service warranty period. It is due to the fact that we strive to develop the long-term & healthy company relationship with our customers.

Own R&D team

This is necessary when it comes to selecting a good provider. High power LED flood illuminate to 1000 to 4000W is a relatively brand-new modern technology in LED lights area (beginning with 00s).

If the companies develop the flood light on their own, they will certainly recognize their product extensively, and also therefore they can offer you the best illumination opinion and also tips when utilizing the lights.

MFG LED Lighting is a flooding light manufacturer possessing a seasoned R&D group. All of our products are created and also fabricated by our designers as well as employees. Our target is to make the current as well as best flooding lights for every exterior or indoor large areas .

High adaptability

All projects have various demand, such as brightness, variety of fixtures as well as poles, setup elevation as well as various other special needs. In order to perform the very best lights solutions for sports area, industrial or commercial lighting, we need to make sure that the flooding light adapts to the adjustment.

At some time our customer will chance the demand prior to closing the tender. What the very best manufacturer should do is to have high adaptability. We always be receptive and also pay attention to our clients.
How to choose the right outdoor LED flood lights?

Quality LED Chips & Driver

For the leading brand names in this sector like Bridgelux and Cree, they master the most advanced technology such as SMD and also COB for their LED chips, and thus the malfunction rate is very low.

However you will expect that the cost is higher. It is extremely advised to choose the LED flood lights that utilize the mainstream chips producer.

High luminous efficiency

This figures out the prolong of power saving of your LED lights. “Lumen per watt” is the unit indicating the power performance. For instance, a LED with 150 lumens per watt mean 1W power creates 150 units of light and illumination. As well as for this reason, you will certainly understand that the lights with 150 lm/W is a lot more power conserving than 120lm/W.

Right beam angle

Light beam angle suggests exactly how spread the light would be. For the high mast or high bay application, if the light beam angle is wide, although the uniformity is really high, the ground illumination is extremely low.

On the contrary, too narrow beam of light angle makes the lighting harmony extremely reduced because it produces several “spots” despite of its high illumination. And thus, there is a best balance in between harmony and brightness. Our designers are proficient in doing the photometric evaluation and also therefore assure far better lighting result for any kind of kinds of jobs.

Good heat dissipation

It stays clear of the LED flood light being damaged as a result of overheating. A good heat sink must be made from pure aluminum which has high heat performing rate of 238 W/mk– higher the value, higher the conductivity rate. The heat conducting price of die cast iron is only 54.4 W/mk.

When it concerns the architectural layout, an excellent heat dissipation system ought to be consisted of enough air ventilation flow inside the lamp. As you can see from the above photo, there are hollow framework and also room between each row of LED chips to assist heat transfer from the light body to the surrounding.

After that, the heat dissipation location ought to be large. The heat dissipation system has thick light weight aluminum fins range to speed up the air conditioning process, and also thus secure the flood lamps.

Waterproof of outdoor flood lights

IP65 is a must. For some environments, IP67 or IP68 is called for such as underwater fountain lights or fishing lights.

Apart from straight water immersion when using the lights, the IP65 rated flooding lights can function under the inclement weather, which is crucial in outdoor sports area, flight terminal, road light and also even more.

Extra tips on sports flood lighting

There are 3 extra tips for you regarding to sports field lamps.

Color rendering index (CRI)

This is an index showing you how well the color will be revealed under a certain illumination. In sports lighting, CRI 70 or 80 is acceptable. But sometimes we will need extra high CRI of 90 to 95 for art gallery, museum or broadcasting.

Glare rate (light leakage)

Which is rarely mentioned yet it is also vital for sporting activities lights– too much leakage will irritate the target markets as well as gamers, it also decrease the brightness on the targeted areas.

Our flood lights adopt the advanced lens that concentrated the beam to the area we desire as well as minimize the light leakage by 50%.

Flickering issue

Although flickering might not be observable by naked eyes, it can be considerable under cams, especially slow motion.

Our flickering rate (lumen fluctuation amplitude) is much less than 0.3% of the overall lumen, and for this reason also the 4K TV broadcasting electronic camera will not have recognizable flickering if the sporting activities field utilize our LED flooding lights.

If you would like to get the lighting design and free photometric analysis, please do not hesitate to contact us

12 Tips to Select the Best Outdoor LED Flood Lights and Manufacturers最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

But your LED lamp wouldn’t even last that long if you buy replacements from unreliable brands/manufacturers. Trust us.

In this article, we have seeded out 10 of the best LED street lighting manufacturers in the world. This is an exclusive list backed by research on market demand, annual revenue, customer satisfaction and reputation over the years.

So help yourself choose any of these manufacturers depending on your budget, location or preference.

LED Lighting Market Analysis and Outlook in 2020: First, let’s have a preview of the world’s LED street light market demand

Data Excerpt from Google Trends (2014-2020) CFL vs LED vs Sodium Light

Over the course of 5 years, LED lights have been successful in dominating the lighting industry. They have been replacing other popular street light bulb options such as CFL lights and sodium light. LED presents more benefits, consuming overwhelmingly less energy, and are eco-friendly.

Data Excerpt from Google Trends (2014-2020)

Another thing is, the LED’s global market is projected to grow by a whopping 24 Billion USD by 2022.
Market demands are from countries like the UK, Ireland, Canada, US, South Africa, Australia, Pakistan, Philippines, India, China, UAE and Malaysia.
And this doesn’t hide the fact that LEDs would be globally in demand for the next decade – creating more successful innovations and options, lowering cost per LED unit and allowing towering numbers of new LED manufacturers.

What can we learn from these facts?

• In the next decade, LED price may be even lower, and more efficient.
• You should update yourself with LED trends, products and other options, as they exponentially keep on getting better.
• Lastly, choose manufacturers wisely, as there are and will be thousands of them globally in 2020.

Top 10 Leading LED Street Lighting Manufacturers in the World: Here are the top players for LED street light manufacturing:

*Annual Revenues extracted from Owler

What puts these companies at the top of other LED street light manufacturers around the world? Find out below as we look deeper into each company.

1. Philips/Signify

Founded: 1891
Top LED Light Companies, Our LED Street Light, Solar Street Light, High Mast LED Light, LED Flood Light, High Bay Light Using Their Products

Philips/Signify is one of the best LED street light manufacturers in the world. The company has an enormous portfolio of LED lighting products which can be used in a variety of applications. This includes street lighting, interior lighting, retrofits and many more. Their strong global presence and renowned products has enabled them to export to over 70 countries worldwide.

Philips has been up for over 125 years. They have invested a lot in R&D, innovation and reach expansion to make world-class lighting solutions.

Their products are not only cost effective, but also environmentally-friendly.Simply put, when you buy LED lights from Philip, their products are extremely guaranteed that you won’t have to worry about any downtime. If an established manufacturer is what you’re looking for, Philip can be it.
 

2. Osram

Founded: 1919

OSRAM’s latest tweets showing how the company gives full support on sustainable movements worldwide

Osram is another LED street lighting manufacturer and distributor with a famous, world-wide presence.

The company specializes in the development of opto-semiconductor products. Aside from LED lighting solutions, they also market their top-of-the-line sensor technologies.

Over the years, Osram has overwhelmed the world with their high-quality LED solutions that has the ability to closely match natural lighting.

This can not only improve roadway visibility, but also help animals stabilize their visions in the night and prevent light pollution.

Hence, Osram is also a promising company to partner with.

3. Hubbell

Founded: 1963

Hubbell’s Latest Tweet supporting LED lighting design and innovation

Hubbell has over 57 years of experience in manufacturing outdoor lighting solutions. The company also supplies a wide range of residential lights, and industrial and commercial lights.

The company is known for creating innovative solutions and technology for delivering high performance lighting.

Globally, Hubbell has served the commercial, industrial, electrical distributor and contractor markets.

4. Acuity Brands

Founded: 2001

Acuity Brands has over 19 years of experience in manufacturing LEDs and other lighting solutions. They have a wide range of products for both indoor and outdoor lighting.

Acuity Brands is a proud holder of advanced LED lighting technology integrated with humanized, digital controls. They also offer organic LEDs.

5. Nichia Corporation

Founded: 1956

Nichia Corporation has over 64 years of experience in the design and manufacture of LEDs for street lights, display and other indoor and outdoor applications.

One of the key highlights of the company is being the first to revolutionize white LED. They are also the leader for many LED innovations such as the UV LED, which captured the world’s attention. With that, we can expect a lot of other great innovations from this company.

6. GE Lighting

Founded: 1911

GE Lighting is one of the oldest and most established LED manufacturers and distributors in this list. With the company having over 109 years of experience, they have patented tons LED lighting solutions.

GE LED bulbs are quite unique in the market. They feature sleep/wake support, with voice control and visual timers.

In 2015, the company has released a range of LED lights for display with astounding and relaxing colors. In outdoor lighting applications, they feature the “LED+ Dusk to Dawn” designed with a built-in sensor to sustain night lighting. For street lighting, they developed “Evolve GE Lighting” for roadway lighting.

7. Eaton Cooper

Founded: 1911

Eaton has delivered both commercial and industrial lighting products across the globe. The company has over 109 years of experience in the LED industry.

Eaton’s LED products featured in 2019’s IES Progress Report

Eaton has helped millions of people with their efficient lighting solutions. They have exported their products to over 175 countries.

Eaton has put much dedication in improving their products to become sustainable and eco-friendly.

They have developed tons of power management technologies that are both reliable and efficient.

8. Cree

Founded: 1987
Top LED Light Companies , Our LED Street Light, High Mast LED Light Using Their LED Products

Cree has over 33 years of experience in manufacturing and supplying LED lights. So far, the company has been one of the most popular distributors of LEDs for street lights. This is because Cree holds high quality lighting with down-to-earth pricing.

We have been seeing Cree strive on producing superior lighting that can match up affordability. In 2013, they’ve launched the first warm LED for only $10, a time when the average price was $11-$13. In that same year, they’ve launched the lowest priced LED street light in the market.

Cree’s support on sustainable movements

Cree LED chips are highly recommended and used for many solar street light lamp fixtures.

They are a combination of InGaN materials and SiC substrates, which deliver the required endurance coupled with high performance needed by semiconductor equipment.

Cree also develops a variety of indoor and outdoor lighting and smart automated lighting.

If you want value-priced LED street illumination with undeterred quality, Cree is the best choice.

9. Bridgelux

Founded: 2002
Green Tech Lighting LED Street Light, Solar Street Light, LED Flood Light Using Their LED Products

Bridgelux has over 18 years of experience in manufacturing and marketing cost-effective and solid-state lighting solutions. The company has established its name for delivering clean and excellent performance LED lights.

Bridgelux has patented several illumination technology for various applications. They carry high bay lights for warehouses and factories, as well as outdoor lights for roadways, building exteriors, parking lots and landscapes.

Bridgelux tweet about minimizing LED glare through proper design

10. LED Roadway Lighting/Liveable Cities

Founded: 2007

LED Roadway Lighting has over 13 years of experience in producing smart LED lighting systems. They also hold smart street lighting products that are being distributed all over the world, in 60 countries.

The company also provides LED illumination solutions for smart cities, such as LED streetlights, sensors, network technology and management software. Their Streetlight Intelligence (SLiQ) has been one of the most in-demand products this 2019 and it was featured in the IES Progress Awards.
 

Wrapping Up

In choosing an LED lamp for your street light replacement or retrofit, price goes hand-in-hand with product quality and performance. We hope that this article has helped you choose the right LED street lighting manufacturer to provide you with reliable products

Top 10 Leading LED Street Lighting Manufacturers in the World最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

Guide to Best High Mast Lighting Systems and LED LuminairesA high mast light is an area lighting system that is raised high to minimize ground level obstructions and create uniform illumination across a large area. Throwing a controlled flood of light from above 15 meters (18 m – 55 m typically), high mast lighting systems are the functional extension of public lighting infrastructure which provides area and road illumination at pedestrian, urban or vehicle scale from below or at a height of 15 meters. The high mounting height combined with a multiple-luminaire configuration makes high mast lighting the most efficient and effective way of illuminating large areas. High mast lights are also the most heavy duty lighting systems that must possess the strength and resistance required to survive the most challenging outdoor environments.

Advantages of High Mast Lighting

High mast lighting is primarily designed to provide an extended lighting coverage while minimizing shadows that may occur when shorter poles are utilized. Expansive light distribution from a single assembly of luminaires allows large area lighting with minimum poles. Wide pole spacing means less visual clutter and improved visibility. Low pole density creates less physical obstacles and hence leads to improved safety. Increased mounting heights allow far reaching illumination using high power luminaires, therefore high mast poles can be located away from traffic areas and high activity spaces. This results in fewer design conflicts with other elements and allows more efficient space utilization of the area being illuminated. The use of high mast lighting poles for co-location of other high mast equipment such as surveillance cameras and cellular antennas reduces the number of tall structures required in an area.

Typical Applications

The ability to deliver large area illumination with maximum pole spacing lends high mast lighting to a multitude of applications. That being said, high mast lighting is an extremely versatile outdoor lighting solution in that it can provide accurate and comfortable visibility for massive outdoor areas during the nighttime and extend the usability of large-scale outdoor facilities into night. Among various types of outdoor lighting infrastructures, far-field, large area high mast lighting plays an exclusive role in facilitating nighttime travel and transportation, citizen engagement in social gatherings and sports/recreation activities, around-the-clock industrial production, safety and guidance of traffic, and security of commercial, residential and public facilities and properties.

Highways and interchanges

High mast lighting provides a full panoramic view of roadways, intersections, roundabouts and crossworks as well as the areas immediately beyond the roadways. Both foveal and peripheral visions are critical to safe navigation of the road system. The ability to pull the roadside obstacles, fixed structures and approaching objects within the field of view of a driver provides greater visibility and visual comfort to traveling motorists, which translates to enhanced safety and security of road traffic.

Stadiums and athletic fields

High mast systems provide a uniform luminous environment that contributes to the visibility of the playing target, the players and the surrounding backgrounds. There’re a variety of sports held outdoors, which include but not limited to archery, baseball, bicycle racing, golf, motor racing, horse racing, football, soccer, skating, cricket, track and field. Luminaire location is a key consideration in the lighting design of outdoor sports venues. The lighting design is challenged by various factors such as light blockage, light distribution, visual comfort, and television broadcast. High mast lighting is the only way to address these challenges.

Commercial parking lots

A high mounting height for area luminaires assists in reducing shadows between parked vehicles. Highly efficient lighting with minimal obtrusive light for drivers can be provided for very large parking areas by using high mast installations. In environments with multi-pole lighting installations, the area where the candlepower beams of adjacent luminaires meet usually has a low luminance that requires the visual system to adjust to the change in the light level. Wide coverage of light with high mast lights reduces pole density, which means reduced frequency of transient adaptation to different vision states. High mast poles can be placed along perimeters of the parking areas for a minimum of interference.

Airport aprons

The aprons, including commercial aprons, general aviation aprons, cargo aprons and hangar aprons, require adequate illumination to ensure the parked aircraft are safely serviced. High mast lighting which allows a large setback distance of the poles can be easily coordinated with buildings, apron equipment and boarding bridges to avoid conflicts. Optimum visibility, uniformity, and glare control can be achieved by high mast floodlighting from multiple directions.

Freight terminals

High mast lighting can provide effective large-area illumination for outdoor logistics activities in airports, seaports, railroad terminals, and trucking terminals. Freight terminals are often filled up with stacked cargo containers. High piles of stock require a raised light source to provide adequate vertical illuminance and reduce shadows. High mast lighting systems can be located remotely or used in confined spaces with no or minimal interference encroaching on adjacent cargoes or the loading and discharging equipment.

Industrial facilities

Petroleum refineries, chemical plants, drilling rigs, oil depots, open pit mines, and other manufacturing and industrial facilities utilize high mast lighting to illuminate large production areas for around-the-clock operation.

Structure

A high mast lighting system consists of three main sub-assemblies: mast structure, headframe, and luminaires. The headframe can be further divided into the fixed and mobile types. In a system with a mobile headframe, the mast structure has a winch mechanism which allows the headframe to be lowered to ground level for luminaire maintenance. The mobile headframe comes with a latching mechanism that holds the entire weight of the headframe and luminaires. In fixed headframe systems, the mast either has rungs/ladders or a motorized lift system via which the maintenance platform can be accessed. The mobile access system can be a mobile step system gliding on two rails fixed to the mast, or a power lift consisting of a cage, a guidance system, an elevator winch system and a safety braking system.
The headframe where a cluster of luminaires are mounted comes in variety of forms. The fixed equipment includes crossarms, rings, and frames. Crossarms such as U-bolted straight crossarms and curved crossarms are designed for lightweight lighting assemblies that use a limited number of luminaires. Rings and frames host more luminaires. A maintenance platform is usually fixed in close proximity to the crossarms, rings or frames to enable convenient servicing. The platform may also be structurally integrated with rings or frames to serve as a headframe assembly. A tilted frame with a central shaft is designed to accommodate a huge number of luminaires for single-side floodlighting. This type of headframes is most often found in stadiums where an exceptional uniformity of illuminance is critical. The mobile headframe is typically a ring structure which is suspended by stainless steel cables passing downwardly from pulleys on top of the mast to a winch in the base of the mast.
The masts are made of high tensile steel plates confirming to BS EN 10025 or equivalent standards and are hot dip galvanized after fabrication. They are continuously tapered and come in a round-conical or polygonal cross section. The mast is delivered to site in sections which fit into one another to achieve a desired height. Masts may come with a hinge which allows to bring the headframe down to human heights for ease of maintenance. The hinged mast has a fixed mast base and an upper part hingeable at either mid-level or the bottom. A weather and vandal resistant door is provided in the base of the mast to provide access to the base compartment equipment like winch, motor, cable. A flange plate, which is welded to the base of the mast, allows the mast to be secured to the foundation by anchor bolts bonded in the foundation block.

Lighting Technology

Large area lighting is a drain on energy because high mast luminaires must output a substantial volume of lumens to cover an expansive zone from a long distance. High mast fixtures for road, area and industrial lighting applications also operate for significantly longer periods than lighting products in other categories. As a result, there’s a never-ending quest for new lighting technologies that comply with ever-changing energy codes. To stay in line with the budget and energy constraints, the outdoor lighting market had long tolerated the terrible color rendition (22 CRI) and low mesopic luminous efficacy (S/P ratio 0.65) of high pressure sodium (HPS) lighting. Since a number of outdoor applications, such as sports lighting and industrial lighting involving color-critical operation, require a decent color rendition, metal halide (MH) lamps had been used to as a supplement to HPS lighting. Although MH lamps deliver a 65 CRI, their luminaire efficacies are significantly low (40 – 50 lm/W). In fact, even the luminaire efficacy of HPS lamps at a typical 61 lm/W is far from perfect. Useful life is another downside of traditional lighting. High-intensity discharge (HID) lamps, including HPS and MP, have only two- or three-year maintenance cycle. Short lifespan severely affects the ROI of HID lamps.
Over the past decades, solid state lighting (SSL) has been making breathtaking progress that is profoundly changing the way light was generated. Outdoor lighting applications are rapidly migrating to LED light sources which provide overwhelming advantages over HID lamps with regards to efficacy, lifespan, light quality, optical performance, and environmental sustainability. While the initial capital costs are higher than traditional lighting systems, LED lighting provides a significantly better return on investment when overall energy and maintenance savings are taken into account. It’s no surprise that LED luminaires can achieve a system efficacy way over 150 lm/W, which results in an accelerated payback. A properly designed and engineered LED luminaire can last over ten years, which translates to a significantly longer gain from the investment. High mast luminaries are energy intensive systems. High energy and maintenance savings with high power LED luminaires over a long period provides a sound justification for investing in LED technology.
Beyond financial returns, LED lighting performs a lot better than HID systems in terms of light quality and optical performance. The scotopic/photopic (S/P) ratio is used to evaluate light source performance in mesopic vision which is the typical vision state in street and roadway lighting. An S/P ratio of up to 2.0 with LED lighting contributes to improved visibility in low light levels and consequently traffic safety. When it comes to outdoor lighting, LEDs have an inherently high color performance. The 70 – 80 CRI is only of low end colorimetric quality for LEDs. Yet this color performance is sufficiently good for outdoor lighting applications, including sports lighting which requires an accurate color reproduction of the illuminated object in order to meet the visual requirements of players, spectators and television broadcasting. HID luminaires cause the area where the luminaire aims to have much higher illuminance than areas around the beam center, which leads to a poor uniformity ratio (6:1 typical). In contrast, the uniformity ratio was improved by more than a factor of two with the LED luminaires. Good uniformity ensures minimal distortion of the visual perception, helps create comfortable visibility, and maximizes pole spacing.

Luminaire Construction

High mast LED luminaires are high power lighting systems that usually consume hundreds of watts and produce tens of thousands of lumens. The construction of LED luminaires varies depending on type of light sources used, optics design, driver design, and thermal design. The luminaire comprises essentially an LED assembly, an LED driver, a die cast housing, and oftentimes an additional electrical compartment. The LED assembly comes in either an integrated design in which an LED board is thermally interfaced with the luminaire heat sink and protected by the luminaire housing and optical lenses against dust and moisture, or a modular configuration in which the use of self-contained, waterproof light engines eliminates the need for the whole luminaire to be disassembled when there is a need for a modification or upgrade. The LED assembly typically comes equipped with secondary optics to regulate the distribution of luminous flux at package-level, although there’re some products, e.g. LED floodlights, using external reflectors to control beam spread.
The luminaire housing often serves the dual purpose of environmental protection and thermal management for the LEDs. Die cast aluminum construction provides strength and durability as well as thermal conduction and convection. LED luminaires used on high mast installations must be reliable and dependable in the most extreme environmental conditions. The aluminum housing is powder coated with a UV stabilized, high corrosion resistant polyester paint, laboratory tested for superior weatherability, cracking and fade resistance. The optical chamber of the integrated-type luminaire is completely sealed with a one-piece extruded silicone gasket placed between the housing and optical lens. High ingress protection (IP) rating ensures absolute resistance to the intrusion of water, insects and dust. A membrane breather equalizes pressure differentials within sealed enclosure to avoid premature seal failure and thus to preserve the integrity of the enclosure.

Thermal Management

One misconception of LED lighting is it can last for a considerably long time, such as 10 years or beyond. While long lifecycle is certainly an intrinsic advantage, there are failure points. Most of the degradation and failure mechanisms that rule the performance and lifetime of an LED luminaire are caused by inefficient thermal management. LEDs convert only a small part of electrical energy into light and the rest is converted into heat. As a byproduct of operation, heat is produced as a result of non-radiative recombination in the LED junction and Stokes shift in the phosphor layer. At high power, higher current density operation which is typical in high mast lighting, a substantial amount of heat is generated. If this heat is not dissipated properly, thermal buildup within the LED causes lumen depreciation due to degradation and quenching of phosphors, die cracking, bond wire fracture, solder joint fatigue, carbonization of the encapsulant, etc.
Thermal management is a critical part of the design and engineering of LED luminaires. Thermal equilibrium in an LED system is broken by conditions that reduce an efficiency of heat dissipation. The goal of thermal management is to build a thermal path along which the thermal resistance of the components is minimized to a required level, while maximizing the effective area of the thermal path and minimizing the length of the thermal path. SSL thermal management consists of two sections: thermal conduction and convection. Thermal conduction copes with maximizing thermal conduction capacity of the heat sink, thermal interface material (TIM), metal core printed circuit board (MCPCB), and interconnects between the LED packages and MCPCB. This part of thermal management also includes minimizing difference in coefficient of thermal expansion (CTE) between the components along the thermal path. This is extremely important as outdoor luminaires can undergo repeated temperature cycling which can compromise the integrity of the thermal path.
The removal of waste heat by thermal convection is dependent upon the flow rate of the ambient air and the surface area around which air is circulating. Since there is an abundant availability of air flow around the luminaire in outdoor environments, high mast luminaires utilize natural convection to dissipate heat into the air. As a general rule of thumb, the heat sink is designed with a large surface area and an aerodynamic geometry to ensure effective air circulation.

Power Supply

LEDs are complex semiconductor devices whose intercorrelated electrical and thermal characteristics should be factored into system design. As current-driven devices, LEDs must operate under constant current regulation in order to maintain their consistent output. Every LED, however, has a maximum rated current. Overdriving what the LED is rated for will result in irreversible performance degradation and shortened lifespan. As the current density is increased beyond a certain threshold, the internal quantum efficiency (IQE) is dropped. The reduction of quantum efficiency at high operating currents is called efficiency droop. A loss in efficiency means an increase in waste heat production. The forward current across the semiconductor junction of the LED can rise above the maximum allowed limit when there’s an overvoltage event, or a failure of another LED string connected in parallel configurations.
An LED driver which regulates the power to the LED array of a high mast luminaire is designed as a switched-mode power supply (SMPS). SMPS drivers use a switching regulator to transform power rectified from AC mains supply into a pulsed waveform, which is then smoothed using an energy storage device. Switching power supplies are the only viable option for high power applications as they are very efficient, allow advanced dimming control, and have universal input voltage capability. In particular, the efficiency of an SMPS LED driver can be as high as 97% which is way much better than linear power supplies. Linear regulators have the advantages of low cost, driver-on-board (DOB) capability, and absence in electromagnetic interference (EMI). These driver circuits are found in some low-end products. However, this type of driving mechanism requires an input voltage at least some minimum amount higher than the desired output voltage. The minimum voltage differential between the input and output required for regulation is simply thrown away as waste heat, which not only leads to a significant power loss of around 20% but also produces substantial thermal stresses to co-located semiconductor components.
Switched-mode LED drivers are technically complex in that they use reactive components, such as oscillating coils and electrolytic capacitors in order to convert and store the electrical energy. Switching regulation generates high frequency noise that has to be suppressed by EMI filters. EMI filters also use reactive components such as filtering coils and high voltage capacitors. Flicker can be a problem in sports lighting applications and outdoor nighttime events where television recording and broadcasting take place. A ripple suppressor can be added to the driver circuit to reduce the output current ripple so there are no stroboscopic effects caused by flicker from the light source as well as no perceived flicker at high camera frame rates. Another essential requirement for line-operated LED drivers is power factor correction (PFC) which shapes and time-aligns the input current into a sinusoidal waveform in phase with the line voltage. The PFC is also used to suppress total harmonic distortion (THD) caused by non-linear electrical loads.
An LED driver executes a number of sub-tasks sequentially or in parallel, including but not limited to overcurrent protection, overvoltage protection, over-temperature protection, zero-current detection (ZCD) and handling, peak-current detection and handling, analog or digital voltage compensator, and constant light output (CLO). High mast luminaires are exposed to transient overvoltages caused by lightning, industrial and switching surges, or electrostatic discharges (ESD). A single-pulse event will cause an immediate catastrophic failure of the LED. Accordingly, a surge protective device (SPD) should be used to suppress excessive surges.

Lighting Control

One of the significant advantages of LED lighting technology is the ability to work with solid state circuits and control the light output in a very dynamic way. High mast lighting systems can incorporate multiple control strategies for automated or remote switching or dimming operation. Lighting controls, including occupancy controls, photocontrols, time clocks, and energy management systems, are often installed at the circuit or luminaire level. LED drivers are configured to interpret control signals to dim or switch the LEDs. The control signals can be communicated to the luminaires using a variety of wired and wireless protocols, such as 0-10V, DALI, and ZigBee. Both local and centralized control systems can be integrated into high mast lighting systems. Luminaires or fixtures can be assigned to different zones, or areas of controls to maximize the flexibility of lighting control. Networked control systems combine software and hardware to provide a wide range of options for more adaptive lighting control and sophisticated user interactivity.

Light Source

Recently, high mast luminaires that incorporate mid-power LEDs have been creeping into the market. What make mid-power LEDs appeal to lighting manufacturers are their low price points and high luminous efficacies. The problem is, mid-power LEDs are plastic leaded chip carrier (PLCC) packages that are prone to package material deterioration and rapid performance degradation in high power operating environments. The high efficacy of mid-power LEDs is founded on the high reflectivity of the plastic cavity and plated lead frame. At high temperatures and intense light levels, irreversible thermal oxidation and photodegradation in plastics, in particular polyphthalamide (PPA) and polycyclohexylenedimethylene terephthalate (PCT), can occur. The epoxy molding compound (EMC) has an improved thermal stability, but only to a limited extent. Silver plated lead frame which is exposed to the micro climate containing sulfur compounds will corrode. All these lead to a significant drop in light extraction efficiency. Not only do mid-power LEDs have a poor lumen maintenance and color stability, their reliability is a serious concern in outdoor environments. Leadframe corrosion can lead to an open contact because a mechanical separation between the bond wire and the connecting lead. The bonding wire that connects the lead frame to the LED electrodes can break due to internal stress, environmental vibration, thermal cycling, and electromigration.
For dependable lighting with high mast lights, high power LEDs deserve their prices. The ceramic-based LED packages are unencumbered with thermally unstable packaging materials. Unlike plastic-based mid-power LED, high power LEDs have high drive current capability and can survive a significantly higher operating temperature without compromising luminous efficiency and lifespan. The high power family also includes chip-on-board (COB) packages which are multi-die LED array typically used in applications needing a high lumen package from a light emitting surface with high emission uniformity. In addition to their high thermal performance, both high power ceramic LEDs and COB LEDs provide highly reliable interconnectivity between the package and MCPCB. The reliability of the interconnects between the LED package and printed circuit board is very critical in ensuring the overall reliability of an LED luminaire.

Optical Engineering

High mast LED luminaires generally utilize integrated optical control components to produce useful beams and patterns without using any auxiliary optical control. Total internal reflection (TIR) optics use a refractive lens inside a reflector to control the entire initial distribution from the LEDs. The injection molded polycarbonate, PMMA or silicone lenses provide precise direction of the light to intended location. Glass refractors and glass convex lenses maximize light distribution and light uniformity. Aside from high efficiency extraction of luminous flux from the LEDs and uniform distribution of illuminance for maximum visual comfort and pole spacing, the optics must produce precise light patterns to facilitate glare control while reducing the growing concern with spill light or light trespass.
While plastic optics can be designed to provide the most accurate light distribution with minimal light loss, they have high moisture and gas permeability, and are susceptible to chemical ageing. Another major concern is exposed polymer optics can result in 3% output loss per year due to luminaire dirt depreciation. Glass is less attractive to dust and dirt accumulation. Therefore, in outdoor environments the LED luminaires should be preferably sealed with a flat tempered glass to exclude dirt and moisture and protect the plastic optics from environmental contaminants.

Featured Products

Here’s a roundup of some noteworthy products for your reference. (Disclaimer: We’re not affiliated with any beneficiary of the external product links in this list.) This is a continuously updated list. We welcome product suggestions from those who take pride in building compelling value into their products. (Owners of products listed here are authorized to use our badge to promote your achievement. Please include a link to this page for listing verification.)

Signify HighFocus

The HighFocus LED high mast luminaire continuously pushes up the benchmark for performance, reliability, and energy efficiency with its high specification engineering and future-proof design. HighFocus thrives in extreme environments and excels in delivering superior optical performance with unmatched ROI. Whether you’re looking to install a complete high mast system, or upgrade an existing HID high mast system, HighFocus makes the choice easy.

Green Tech High Mast

Green Tech’s HighMast LED luminaires are highly engineered stadium and arena lighting systems designed to deliver optimal light for on-field activities and video productions, visual comfort for audience, and reduced light pollution outside of the venue. Best-in-class thermal management combines with high quality light sources, optics, and electrical components, all working together to deliver a great performance-engineered system.

Typical Applications of Led High Mast Light, High Mast Lighting Systems最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

• The common faults are mainly as follows
• The structure and composition of solar street lights
• The working principle of solar street lights
• Problems&Reasons&Solutions
• Still have questions?

Solar-powered street light is a typical case of new energy application. Its green environmental protection, energy-saving, money-saving, and wiring-free characteristics make it widely used in roads, courtyards, squares, and other outdoor places all over the world, especially in regions and countries with abundant solar energy. Like other outdoor LED street lights and Solar Floodlights, solar street lights will inevitably have some failures due to long-term exposure to wind and sun during use. By this article, We will introduce the common failures of solar street lights and the troubleshooting methods.

The Common Faults Are Mainly As Follows

• Solar led street light is not working at all.
• The lighting time is too short.
• The solar street light always stay on during daytime
• Some led chips of led street light fixture is not working
• Solar led street lamp flicker
• Induction function failure
  The above faults and problems are often inseparable from the components of the entire solar street light system. To clearly know the cause of the failure and the solution, we must first understand the structure and working principle of the solar street light system.

The Structure And Composition Of Solar Street Lights

Solar street lights can basically be divided into traditional split solar street lights and integrated solar street lights. They all combine components such as high-efficiency solar panels, long-life lithium batteries or lead-acid batteries, high-efficiency LED street lights, and smart controllers into an independent system (integrated solar street lights often also include PIR human body induction Module, anti-theft mounting bracket).

Solar panels: The main function of solar panels is to convert light energy into electrical energy. It is one of the core components in the entire solar street light system. It mainly includes monocrystalline silicon solar panels and polycrystalline silicon solar panels.

• The photoelectric conversion efficiency of monocrystalline silicon is about 15%, and the highest is 24%. This is the highest photoelectric conversion efficiency of all types of solar panels, and the life span can reach more than 15 years.
• Polysilicon solar panels have great advantages in cost. The life span is more than 10 years.

Solar battery: The battery is mainly used to store electricity. Currently, the market mainly includes lead-acid batteries (AGM and GEL batteries) and lithium batteries (ternary lithium batteries and LiFePo4 Batteries). For the choice of batteries, you can refer to here.

Solar controller: The solar controller is a device used to control the photovoltaic PNS.

Solar street light fixture: the light-emitting part of the solar street light system. Composed of the LED light source.

Radar/PIR Sensor: This is mostly used in all-in-one solar street lights. It can better help solar street lights achieve energy-saving effects.

What types of battery is the best for solar street lights?

The Working Principle Of Solar Street Lights

Solar street lights use solar panels to receive solar energy during the day and convert them into electrical energy, which is stored in the battery through the discharge controller. The illumination gradually decreases at night. The charge and discharge controller detects this value and works, and the battery discharges to the lamp holder. After the battery is discharged for 10 hours, the charge-discharge controller starts, and the battery discharge ends. The main function of the charge and discharge controller is to control the lighting and correlation of street lights while protecting the battery and prolonging the service life of the battery.

After understanding the composition and working principle of the above solar street lights. We can better analyze common faults and corresponding solutions.

Problems&Reasons&Solutions

In summary, the failure of solar street lights is closely related to the components in the entire system. According to the specific failure performance to determine its cause and related solutions. 
Solar street light is not working at all

The lighting time is too short

Solar street lights always stay on during daytime

Some led chips of the led street light fixture are not working.

Solar street lights flicker

Induction function failure (mainly for Integrated solar street lights, or all in two)

Still have questions?

If you cannot find an answer to your question in our FAQ, you can always contact us, and we will be with you shortly.

Failures and Solutions of Solar Street Light, Solar Streetlight Common Fault最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

All in Two solar street light
The battery and the LED light source are integrated together, the solar panel is separated, and the LED light source is not extended outwards.

Split solar street light
Battery, solar panel and LED light source are separated. The arm of the light pole extends the LED light source about 1m~1.5m, the solar panel is installed on the top of the light pole, and the wire is 8-25m long to connect all parts. The battery is buried or hung on a light pole, the battery can be easily stolen.

All in One solar street light
The solar panel, battery, and light source are integrated, easy to install, the solar panel cannot adjust the angle

The main differenceSolar panel angle adjustable, internal circuit resistance, installation difficulty, heat dissipation, arm extension, battery anti-theft,
Total Cost: product cost + labor installation cost + transportation cost + aftersale cost

1. Arm Extension
Generally, street lights will have a support arm to extend the LED light source to the inside of the road, so that a better light distribution area can be obtained on the road.

2. Solar panel angle adjustable
In the northern hemisphere, the solar panel needs to face south; in the southern hemisphere, the solar panel needs to face north. And the higher the latitude, the greater the tilt angle of the solar panel. This can improve the efficiency of sunlight absorption

3. Heat dissipation
Heat will cause the lifespan and light efficiency of the LED lamp bead to decrease, as well as the lifespan and capacity of the battery. Solar energy is exposed to direct sunlight, and the highest temperature can reach 90 degrees Celsius in summer. It is of great significance to isolate the hot solar panel from the battery and LED lamp beads as much as possible for heat dissipation.

4. Installation difficulty
Simple installation can reduce installation errors, fast construction speed, and save labor costs.

5. Internal circuit resistance
Solar street lights are low-voltage products, and the internal resistance of low-voltage products accounts for a large proportion of power consumption. The batteries, wires, and controllers in the entire circuit are also resistors. The longer the wires, the greater the resistance. Therefore, the wires of low-voltage products should be as short as possible to reduce power loss.

6. Total cost
The comprehensive cost includes product cost + labor installation cost + transportation cost+aftersale cost. Although the product cost of split solar street lights is relatively low, the labor installation cost and transportation cost are relatively high, so the comprehensive cost of split solar street lights is the highest.

7. Battery anti-theft
The most valuable part of solar street lights is the battery. In many countries, split solar street lights can easily be removed and stolen because the battery is separated. The batteries of all in one and all in two solar street lights are integrated in the lamp shell, not easily stolen.

Difference between Split, All in two and All in One Solar Street Light: 7-point Comparison最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

Overview:

Why LED will produce heat？

How to cool LED light? 

1. Led chip packaging heat dissipation

2. LED light heat dissipation

   1) Aluminum profile

   2) Thermally conductive plastic shell

   3) Cooling Fan

Why will LED produce heat？

      Many people know that LED lights have high luminous efficiency and energy saving, but they don’t know that the conversion efficiency of LED lights into light energy is only 10%-20%. That is to say, a 10w led light is only 1-2w. Electricity is used to emit visible light, and the remaining 8-9w of electricity is used to generate heat.

      However, it can reach 10%-20% efficiency, which is already very good, because almost 10%-20% of the converted electric energy is used to emit visible light, and there is very little other infrared and ultraviolet light, compared with traditional white woven lamps and fluorescent lamps. Generally speaking, there are still great advantages. For traditional incandescent lamps, most of the energy is directly converted into infrared emission, so the heat is very low.

How to cool LED light?

The heat dissipation of the Led mainly starts from the heat dissipation of the Led chip before the packaging and the heat dissipation of the Led light. So below, we will introduce how to dissipate heat from LED lights from two aspects: LED chip packaging and LED light.

1. Led chip packaging heat dissipation:

     The calorific value of high-power LEDs is dozens of times that of low-power LEDs. Therefore, as the temperature rises, the luminous power decreases. Perhaps the LEDs below 20-30lm/W do not have these problems, but When faced with high luminous power LEDs above 60lm/w, you have to find a solution, because the impact of thermal effects will definitely not only be the LED itself but will bring about the overall application product into trouble.

     Because the current used increases, the disadvantage is whether the packaging material can withstand the heat generated by the current for such a long time, and because of such continuous use, the thermal resistance of the packaging material tends to decrease, so choose Good packaging materials are particularly important. Click here to learn about the top 10 global LED chip brands.
 

 2. LED light heat dissipation：

      The cooling method of the LED lamp housing depends on the power size and the location of use, which can be solved by physical means in the later stage. The picture on the left is a UVA LED bulb customized by Green Tech Lighting for a British customer, which combines 3 common heat dissipation methods as follows:

      1) Aluminum profile heat sink: The most commonly used thermal method uses aluminum profiles as part of the shell to increase the cooling area.
 LED Streetlight, Solar Street Light, High Mast Light, LED Flood Light all are with aluminum profile heat dissipation.

      2) Thermally conductive plastic shell: The plastic shell is filled with thermally conductive material during injection molding to improve the thermal conductivity and heat dissipation capacity of the plastic shell.

      3) Cooling fan: Inside the lamp, housing is a high-efficiency fan with a long service life, which can enhance cooling, with low cost and good effect. However, changing the fan is troublesome and is not suitable for outdoor use. This design is relatively rare.

      In addition to the above three common heat dissipation methods, Heat exchanger, Surface radiation heat dissipation treatment are not bad for heat dissipation.

How to dissipate heat from LED lights？LED Chip Heat Dissipation最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

Let me share you the useful info. here for your reference:
There is a simple way to know the Lighting range:
Crosswise Lighting range=Pole height*2.5*2
(It determines the installation distance bettween lights. Normally, we suggest to make it 5-10M overlapped to make sure the lighting effect.)
Lengthways Lighting range=Pole height*1.5 (It determines how wide a road could be covered.)

A table of Lighting range and LUX for your reference:

In LED lighting industry, we have professional tool DIALUX to simulate the actual lighting effect according to the IES file of street lights.
We can see if your installation design is appropriate.
For Instance: 120W All in one solar street lights installed on 10M height and with 50M distance as bellow, the distance is so long that cause a long dark area too.
– It’s not appropriate for the actual lighting.

Another Example: 12PCS 120W All in one solar street lights with ring mounted on 30M height. Lighting effect as bellow, this case is suit for the places of the square/park lighting.

Would you also like to know weather your design appropriate for your project? Contact me for help

Lighting Range and illuminance Analyisis for Solar Street Lights最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

Solar Parking lot Light Overview:

What is a solar parking lot light?
A solar parking lot light is one type of light source that is fully powered by solar energy. It’s consist of the LED parking lot light, solar panel, battery, controller, and another component. The solar panel collects energy to charge a rechargeable battery during the day, then the battery provides energy to the fixture during the night. They come in a large variety of shapes and sizes with optional features such as motion sensors and remote controls.

Why should we use solar parking lot lights?
As we know, climate change is today’s biggest threat to the world’s safety and the health of our economies. The greenhouse gas (GHG) emissions we generate—are the leading cause of the earth’s rapidly changing climate. The burning of fuels like coal, oil, and gas for electricity, heat, and transportation is the primary source of greenhouse gas. There is a strain on fuels such as oil, gas, and coal due to overconsumption, which called the energy crisis. Using clean, renewable energy like solar energy is one of the most important actions to solve climate change and the energy crisis issues, to reduce the impact on the environment. Thus, the solar parking lot light market is growing rapidly.
Types of solar parking lot light
There are three main types of solar parking lot lights in the markets: General solar parking lot light, two in one solar parking lot light, and all in one solar parking lot light.
General solar parking lot light: LED parking lot light, solar panel, and battery are installed separated. Usually, the capacity of the battery is large and with more backup days. The power of LED parking lot lights is larger than another two types. This one is better for roadway, parking lot, or any public outdoor area.
Two in one solar parking lot light: Battery and controller installed within the LED parking lot light, the solar panel is separated.
All in one solar parking lot light: Solar panel on the housing of LED parking lot light, battery and controller installed within the LED parking lot light. It with low power but easy to install, suitable for the area doesn’t require bright light, like your backyard.
Advantages of solar parking lot lights
ECO-friendly: Using solar parking lot light could reduce the emission of carbon dioxide
Cost-effective: Solar parking lot light uses sunlight as the source of their energy. You will be saved from paying money to the electricity provider every month. It’s a wise long-time investment.
Require very little maintenance: Solar panels last over 20 years. Apart from cleaning and doing a few check-ups, there isn’t much to do to ensure its longevity. It’s will help you save a lot of maintenance costs.
Easy to install: It does not require wiring to a faraway power station. You can put it anywhere you need to light up. Hassle-free operation according to instruction.
Safe: Direct current(DC) electricity is what solar panels produce and hold in a battery, compare with alternating current(AC) electricity, DC is safer for human.

Components of Solar Parking lot Light

Solar Panels: The solar panel is one of the most important parts of a solar parking lot light, solar panel collects energy during the day, convert solar energy into electric energy that the light can use. There are two types of solar panels commonly used in solar parking lot lights: mono-crystalline and poly-crystalline. The conversion rate of mono-crystalline solar panels is much higher than their polycrystalline counterparts.
LED parking lot light: LED features energy-saving, the energy consumption of an LED fixture is at least 50% lower than the HPS fixture, LED fixtures are also less prone to failures with an average number of 50,000 working hours, whereas traditional parking lot lights range from 5,000 to 8,000 working hours with the much higher failure rate. So LED parking lot lights used as the primary light source of solar parking lot lights.
Rechargeable Battery: Battery is used to store the electric energy from the solar panel during the day, and provide energy for the LED parking lot light at the night. The capacity of the battery affects the backup days of the lights, and the life cycle of the battery is important to the lifespan of the light. Gel cell deep cycle batteries, lead-acid batteries, and absorbed glass mat (AGM) batteries are three types of batteries commonly used in solar power lights. Lithium-ion batteries are also popular nowadays, as they are compact in size, have a higher energy density, voltage capacity, and lower self-discharge rate.
Solar charge controller: Controller is the brain of the solar parking lot light. It’s a regulator, solar charge controller decides when to turn on or off the lighting, and when to charge the battery. When the battery is nearly full, the controller will taper off the charging current to maintain the required voltage to fully charge the battery and keep it topped off, it protects the battery from both overcharging and undercharging. There are mainly two types of solar charge controller:pulse-width modulation (PWM) and maximum power point tracking (MPPT).
Sensor: Using sensors are one of the best ways to lower the power needs of solar parking lot light. There are some types of sensors, such as dusk to dawn sensor, motion sensor, and so on.
Pole: For every solar parking lot light, a strong pole is essential. The solar panel, battery, LED light, and such all heavy components are mounted on top of it, and it should bear hurricanes in some areas. The pole should rust-resistant and durable enough to support long lifespan LED parking lot light and solar panel.
Interconnection cables: The solar panel, LED lights, solar charge controller, and battery are interconnected with cables. Cable size and lengths depend on the current that goes in the lights and the height of the pole.
The function of solar parking lot light depends on the quantity of above each component, the technology used in the system, and the management of lights. Choosing the right solar parking lot light is not an easy task, we have to know the system design and so many technical specifications. You need a professional and reliable supplier, which could design and choose a suitable component according to your requirement. Below are guides on how to choose components for the solar parking lot lights.

How to Choose Solar Panel

The price of solar technologies has dropped an incredible amount in recent years, more than 80% since 2010. Making solar panels more affordable than they’ve ever been. There are more and more applications based on the solar system. Solar light is one popular application because the LED light source can use direct current(DC) electricity, no need to invest in an inverter.
Choose a solar panel is not easy. There are some factors we have to consider: Conversion efficiency, conversion speed, temperature co-efficient, PID resistance, durability, watts capacity, size, and so on.
Conversion efficiency
Mono-crystalline and poly-crystalline are two types of solar panels commonly in the market. The conversion rate of mono-crystalline solar panels(about 21% nowadays) is much higher than their poly-crystalline(around 18.5%). So we choose a mono-crystalline solar panel for the solar parking lot lights. The color of the mono-crystalline solar panel is purer, is it’s easy to recognize.
Conversion speed
 The conversion speed depends on nickel wire, the nickel wire grid carries electricity to or from the device, so more nickel wire means more quickly. And the thinner the Nickle wire the better, otherwise, the wires will prevent sunlight from reaching the semiconductor.
Temperature coefficient
The temperature of the solar panels has a direct effect on their ability to generate electricity. This impact is reflected through the temperature coefficient, which is expressed as the percentage decrease in output for every 1-degree Celsius (°C) increase in temperature from 25°C (77°F). Solar panels are tested for their efficiency at 25°C, and that is why this is used as the reference point. The lower the percentage per degree Celsius, the better. The price of a module with low-temperature co-efficiency can be a little more.
PID resistance
Potential Induced Degradation (PID) is an undesirable property of some solar modules, occurs when the module’s voltage potential and leakage current drive ion mobility within the module between the semiconductor material and other elements of the module, triggered by certain climate conditions like humidity and temperature. Good solar panels will display little or no PID.
Durability
Solar panels are designed to withstand harsh weather conditions(like extreme temperature, hurricane, hail, frost) to resist dirt and water, guaranteeing at least 20 years of lifetime. It’s required to use top-grade material. But not all manufacturers use good material, here are some tips for you to check with manufacturers.
Type of glass: The glass of the solar panel protects the inside of the module. Low-quality glass may cloud over time and will affect the efficiency of the solar panels. It’s also easy to break cause damage to the module. Tempered is a quality material to use.
Encapsulant: encapsulant is used to bonding and sealing photovoltaic and solar panels, should using UV-resistant material because prolonged UV exposure can cause browning of non-UV encapsulant sealants which reduces light transmittance.
Backsheet: The PV back sheet is on the outermost layer of the PV module. It’s as an electrical insulator, protects the inner components, specifically the photovoltaic cells and electrical components from external stresses. It’s the only layer to protect solar modules from DC voltage. To achieve this, the back sheet should robust and with high dielectric properties. Backsheet failure can result in significant power loss and safety issues ranging from power degradation to bodily harm. Quality back sheets provide voltage protection and maintenance prevention and are equally as important as the glass covering the cells.
Frame: Usually made of aluminum, the frame provides mounting attachment points and protection for the edges of the glass laminate. It’s should be robust enough to withstand any heavy weather or other impacts. Anodized Aluminum is an ideal material as it increases the corrosion-resistance.
Watts Capacity and Size
The watts capacity and size is depending on the power of LED parking lot light. It’s better to buy all components of a solar parking lot light from one manufacture. The manufacturing design and choose the right solar panel for the light source, it’s will help you save time and avoid other issues.

How to Choose LED Parking lot Light

LED parking lot light is the light source of the solar parking lot light, when choosing LED parking lot light, we should consider specification like the efficiency, IP rating, color temperature, luminous efficiency, CRI, and so on. We have to choose suitable LED chips, LED drivers and so on. It’s a complex job. A qualified supplier will do all this for you. For more details, please refer to our article https://chinastreetlight.com/products/solar-courtyard-light

How to Choose Rechargeable Battery for Solar Parking lot Light

There are some kinds of batteries in the market for solar lights: Lead-acid battery, AGM battery, gel cell deep cycle battery, and lithium battery.AGM battery and gel cell deep cycle battery are other types of a lead-acid battery. Let’s see the character of each of them, then we’ll know which one is better for the solar parking lot lights.
Lead-acid battery
Lead-acid batteries have been used for more than 130 years in many applications and they are still the most widely used rechargeable battery for small-medium scale storage applications.
Advantage of lead-acid battery: Low cost; It’s almost fully recyclable; Reliable and tolerant to abuse; it’s available in various shapes and sizes; withstand overcharging; low self-discharge.
The disadvantage of lead-acid battery: Heavy and bulky; not suitable for fast charging; dependence on hazardous and restricted lead, not environmentally friendly; temperatures above 20ºC reduce the lifetime of lead batteries rapidly; limited cycle life, it means short lifetime;
AGM battery
Absorbent glass mat (AGM) battery feature fiberglass mesh between the battery plates which serves to contain the electrolyte and separate the plates has been a market favorite for the past few decades, mainly used in military vehicles as a source of back up power and heavy vehicles such as long-distance trucks.
Advantage of AGM battery: Fast charging, up to 5 times faster charge than with flooded technology; maintenance-free; low self-discharge;spill-proof, because the glass mats holding the electrolyte in place; longer lifespan; durable and could withstand extreme temperature variations.
The disadvantage of AGM battery: Heavy and bulky, low specific energy; high cost; low tolerance to overcharging and high voltages; the capacity has gradual decline.
Gel cell deep cycle battery
The gel cell battery is similar to the AGM battery because the electrolyte is suspended, the difference is AGM battery is a wet cell battery, and the gel cell battery has a silica additive to set up or stiffen electrolyte.
Advantage of gel cell deep cycle battery: Save you from acid leakage and frequent maintenance; corrosion-resistant grids enable long lifespan up to 10 years; low self-discharge; more charge/discharge cycles; last a bit longer in hot weather applications.
The disadvantage of gel cell deep cycle battery: The recharge voltages are lower; sensitive to over-voltage charging; Heavy and bulky, low specific energy.
Lithium battery
Lithium batteries have metallic lithium as an anode. Over the last decade, lithium has been proven to be extremely reliable battery technology. Lithium batteries are widely used in electric cars, cell phones, cameras, laptops, and other mobile devices. Lithium batteries are even used for energy storage in the electrical grid. So it seems like there would be a lot of advantages of lithium batteries over the more traditional types of batteries such as lead-acid batteries.
For solar parking lot lights, the lithium iron phosphate battery (LiFePO4 battery) is commonly used. It’s a type of lithium-ion battery using LiFePO4 as the cathode material, and a graphitic carbon electrode with a metallic backing as the anode
Advantage of lithium iron phosphate battery
Longer life span: Lithium iron phosphate batteries live up to 5000 cycles at 80 percent depth of discharge, without decreasing in performance. Ensure 8-10 years life span. While some lead-acid batteries only have 300 cycles and have just two years of service time.
Maintenance-free: No need for maintenance to extend their life. The battery shows no memory effects. Can be store for a long time due to low self-discharge.
Safe and ECO-friendly: LiFePO4 battery not contain heavy metal and rare earth metals. It’s thermal and chemical stability, which improves battery safety.
Compact size: Compare to a lead-acid battery, the LiFePO4 battery is relatively small and lightweight. Because it offers high power density. About 160Wh/kg-185Wh/kg nowadays.
High efficiency: Fast charging and discharging. Fast charging reduces any downtime and increases efficiency. High discharge pulse currents deliver bursts of power in a short amount of time.
 Summary: After compare lead-acid battery and lithium battery, we’ll know that lithium battery is ideal for the solar parking lot light. Because solar panel, battery, and light fixture all installed on the top of the pole, and have to withstand high wind, it’s require lightweight. The battery should have a high power density for more backup days.
The lead-acid battery may suitable for another solar light due to its low cost but not better for the solar parking lot light.

How to Choose a Solar Charge Controller?

The most important solar charge controller is to properly control the charge and discharge, protect battery and solar panel to give them as long a life as possible.
There are two types of solar charge controllers in the market: Pulse width modulation (PWM) and maximum power point tracking (MPPT)
The PWM is low cost but not as efficient as the MPPT. The MPPT can give you up to 30% more power than PWM, it also allows the strings of panels to be connected in series for higher voltages, keeping the amperage lower and the wire size smaller, especially for long-wire runs to the PV array. 
To choose a suitable solar charge controller, we have to know some information, like The wattage of the solar panel; the voltage of the battery, then we could calculate the amps of the solar controller.
For example 100 watt solar panel/12 volt battery=8.3 amps. Then 10A charge controller is ok for you, if use 200w solar panel and 12v battery, you must go to 20A charge controller.
The solar parking lot light manufacture will choose a suitable charge controller, some controllers build inside the light housing. You could check it with your supplier.

How to Choose Sensor for Solar Parking lot Light?

Since the stored energy in the battery is limited, for more energy-efficient, it requires sensors. There are mainly two kinds of sensors in the market: Dusk to dawn sensor, motion detector(motion sensor) Let’s check their difference and you could choose according to your needs.
Dusk to dawn sensor(Photocells)
Dusk to dawn LED lights turns on and off by the amount of light reaching the light’s sensor, making them suitable for outdoor areas such as yards, parking lots, roadways, parking lots, and other outdoor areas. Its feature uses a small photocell to detect the presence of available and/or existing light. If the light is detected, the motion light will not trigger, so during the day when natural light is enough, the LED lights will not work. When it dark at night, the sensor can’t detect light, it will cause the LED light to work.
Advantage: It’s automatically triggered on and off and low maintenance.
Disadvantage: In the rain season, for solar parking lot light, it’s not the best energy-saving solutions.
Motion detector(motion sensor)
Motion sensors uses one or multiple technologies to detect movement in an area. A motion sensor solar parking lot light automatically activates when a car or pedestrian is been detect in the area. If there is no activity in the area, the solar parking lot light is automatically adjusted to an optimized minimum light level. Thus could save energy for more backup days.
Intelligent solar parking lot light with motion sensor is significant energy savings, light is only provided when it needed. It’s perfect for wet areas.

How to Choose Pole for Solar Parking lot Light?

The pole support all component of a solar parking lot light. It’s should be strong and durable enough. There are mainly two materials for light poles: Stainless steel and aluminum. Each of them has its pros and suitable for different areas.
Stainless steel light pole: Stainless steel is a higher-strength material, suitable for high windy areas to withstand large and heavy loads. Seamless stainless steel pole is durable enough for more than 50 years lifespan. So if the solar light is for a parking lot, a roadway, or in any outdoor area that may have heavy wind like a hurricane, it’s better to use stainless steel.
Aluminum light pole: Aluminum easy machining to different shapes, so ideal to make decorative poles. It’s mainly for yard lights. If you need to put solar parking lot light in your yard, if all the device such as light fixture, battery and solar panel is not heavy, then beautiful aluminum pole is your choice.

Conclusion

We know that use solar parking lot light is a good way to protect the environment. How to choose suitable solar parking lot light is multiple jobs and take time. After our above explanation, wish it’s clear for you and make this job easier. The most important thing is to choose professional manufacture.

How to Choose Solar Parking lot Lights, Solar Courtyard Light最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

An LED heat sink is a heat exchanger that absorbs thermal energy generated by an LED module and then dissipates the thermal energy into the surrounding ambient air. The heat sink is the last and most important part of the thermal path of an LED luminaire. The development of LED lighting technology is inextricably linked to the development of heat sinking technology. The spectral performance, lumen output and useful life (defined as 70% lumen maintenance) of an LED depend to a high degree upon the management of the LED junction level operating temperature. As LED technology pushes the boundaries of optical flux density, thermal management continues to pose a challenge for lighting manufacturers. Thus, as the primary system-level thermal management component the heat sink must be designed to unlock the full potential of LEDs, rather than being a thermal bottleneck.

How Important Is LED Thermal Management

Despite the breakthrough in luminous efficacy, LED lighting still experiences a substantial amount of energy loss in the course of AC-DC power conversion (driver circuit), electro-optical conversion (electroluminescense at the LED junction), and wavelength conversion (Stokes shift at the phosphor layer). Incandescent, florescent and metal halide lamps convert waste energy into various combinations of infrared radiation (IR), ultraviolet radiation (UV), and heat. As opposed to conventional technologies, all energy loss occurring during the light emission process of LEDs is discharged as heat. The system efficiency of most LED Products is less than 50%. This translates to a huge thermal engineering problem that more than 50% of the system power input is converted into package- and board-level heat.

LEDs have a junction temperature dependency of the forward voltage, spectral power distribution (SPD) and luminous flux (light output). The amount of light emitted by the LED drops as the junction temperature rises because the non-radiative recombination prevails at high junction temperatures. The increase in junction temperature will lead to a decrease in the bandgap energy of the active region of LEDs. This results in a reduction in forward voltage. Reduced forward voltage causes a decrease in the electrical power, which, combined with thermal droop, compounds the loss in light output. Thermally induced output drop is accompanied by the color shift. As the LED junction temperature rises, the bandgap between a conduction band and a valence band of the semiconductor layers becomes narrower. Since the wavelength of the electromagnetic radiation in the visible range is determined by the band gap, every 10ºC rise in junction temperature will result in one nanometer increase in the dominant wavelength of an LED. Consequently, there will be a noticeable color shift toward the higher end of the spectrum (yellow shift) when the LEDs operate at high temperature. Color shift also occurs at the phosphor layer when it is operated above the saturation flux level. Loss of phosphor quantum efficiency as a result of high Stokes heat leads to a blue shift.

High temperature operation within a limited period impairs the temporary efficiency and spectral quality of the LEDs. Operating LEDs continuously above the maximum allowed temperature at the p-n junction can lead to irreversible damage to the LEDs. The rate at which an LED will age is inversely proportional to the temperature at the p-n junction. Every 10ºC increase in junction temperature will results in a lifetime 30% to 50% drop in brightness. This permanent reduction in light output from the LED accelerated by a high operating temperature is known as lumen depreciation. Elevated temperatures will also accelerate degradation process of the polymer-based phosphor layer. Phosphor degradation and polymer carbonization end up in a color shift that cannot be tolerated in LED lighting. High junction temperature can cause a high coefficient of thermal expansion (CTE) mismatch between the LED die and packaging materials, which introduces a significant impact on the reliability of the LED.

The Role of a Heat Sink

As the majority of LED failure mechanisms are temperature-dependent, the semiconductor junction temperature must be kept low in order to ensure good performance and reliability. In general, the design of a thermal system includes consideration of the drive current, the ambient operating condition, the thermal resistances of all the components along the thermal path and all the associated interface resistances. Operating LEDs at high drive currents and high ambient temperatures without compromising light output and reliability requires efficient removal of heat from the semiconductor junction to the ambient environment. Heat always flows from higher temperature regions to lower temperature regions until a thermal equilibrium is reached. Thus, the task of thermal management is to reduce the thermal impedance of the lighting system. Thermal impedance is the measure of the total resistance to the flow of heat along a thermal path. It includes all the thermal resistance at component and interface levels.

A typical thermal design for an LED lighting system consists of package-level and system-level thermal management. Package-level thermal management handles the junction-to-substrate thermal resistance and thermal reliability of solder interconnection between the LEDs and the metal-core printed circuit board (MCPCB). System-level thermal management handles heat transfer from the MCPCB through a heat sink to the surrounding environment. To maximize the heat flow from the MCPCB to the heat sink, a thermal interface material (TIM), which can be a grease, epoxy or pad, is placed between the two components to fill in interfacial air gaps and voids. The role of the heat sink to extract the waste heat from the MCPCB as efficiently as possible to the ambient air so that no thermal buildup occurs within the LED packages. To do so the thermal transfer rates of the heat sink must outpace the load rate at which thermal energy is introduced to the junction.

Heat Transfer Mechanisms

There are three mechanisms that a heat sink employs for dissipating thermal energy from an LED system: conduction, convection, and radiation.

Thermal conduction

Thermal conduction is the transfer of heat by microscopic collisions of particles and movement of electrons between objects of differing kinetic energy. In addition to the ambient temperature, the removal of waste heat by thermal conduction is dependent upon the thermal conductivity of a material that the heat sink is made from and the geometry of the heat sink. Metals, metal alloys, some metal oxides, ceramics, diamond and other forms of carbon are good thermal conductors. Graphene, an allotrope of carbon in the form of a two-dimensional, atomic-scale, hexagonal lattice, has an astonishingly high thermal conductivity of 5000 W/mK. Among the metals, pure copper has the highest thermal conductivity (about 400 W/mK). Aluminum and its alloys have moderate thermal conductivities in the range of 90-240 W/mK. Ceramics, which’re both electrically isolating and thermally conductive, offer a thermal conductivity of between 100-200 W/mK. In LED lighting systems, conduction is the first mode of heat transfer along the thermal path. It starts at the semiconductor junction and the thermal load travels through a series of components to end at the convection surface of a heat sink.

Thermal convection

Thermal convection is heat transfer by mass motion of a fluid, which can be either a liquid or, more typically, air. The movement of molecules within the convective medium of fluids takes place when there’s a temperature gradient between a solid surface and the fluid surrounding it or an artificially induced convection current. Convection is dependent upon the mobility of the fluid and the active surface area exposed to the flowing fluid. The mobility of the fluid is expressed by the heat transfer coefficient which is the proportionality constant between the heat flux and the thermodynamic driving force for the flow of heat. When the fluid motion is not generated by external source but by means of the buoyancy force induced by thermal gradients between the fluid and solid, the heat transfer is considered to be natural convection. In other words, natural convection utilizes the buoyancy force induced by thermal gradients between the fluid and solid. A heat sink operating in this mode is referred to as a passive heat sink, which has a heat transfer coefficient of between 5-20 W/m2 K. If a flow is created by means of external forces, the heat transfer is forced convection. Using an external force generated by fans, heat pipes, synthetic jets, or liquid cooling elements to increase heat transfer is called active cooling. With forced convection, the velocity of the air moving through a heat sink can be drastically increased above that of natural convection, with heat transfer coefficients in the range of 25 to 250 W/m2 K for air and 100 to 20,000 W/m2 K for liquids.

Thermal radiation

Thermal radiation refers to heat transfer through the absorption and emission of electromagnetic waves, without utilizing a carrier medium. The magnitude of radiative heat transfer has a very strong dependency on the emissivity and temperature of the surface material. Generally, non-metallic and non-transparent materials exhibit a high emissivity which typically exceeds 0.80. The emissivity of metals can vary between 0.02 (e.g. aluminum foil) and 0.90 (e.g. anodized aluminum) depending on the geometrical arrangement and surface treatment of the metal surface. A polished, shiny metal surfaces radiate very little heat. A painted or anodized surface radiates significantly more heat than a bright, unpainted one. The electromagnetic radiation rate of a material is proportional to its rate of absorption. Therefore, black colored surfaces that absorb more radiation than lighter colors such as white or metallic surfaces are more efficient in thermal heat transfer. The thermal energy transmitted through radiation increases steeply as the temperature rises. However, radiative heat dissipation at normal temperatures (0 – 100 °C) is generally negligible as compared to heat transfer by convection.

Heat Sink Design Considerations

An LED heat sink is designed to first conduct heat away from the LED junction and then to convect and radiate heat to the ambient air. To fulfil the first role, the heat sink must be fabricated from a high thermal conductivity material to maximize heat transfer between the MCPCB and the exposed heat sink surface. As air is a poor thermal conductor, the heat trapped at the heat sink surface can only be dissipated via convection (and radiation depending on the type of luminaires and their applications). To accomplish the second task, the heat sink is required to have a sufficiently large enough surface area to convect heat away to the surrounding air. An aerodynamic design and/or a forced convection mechanism will be employed to ensure effective air circulation.

Radiation is hardly a contributing factor in thermal management for LED lamps (bulbs, tubes) and low-to-mid-power LED luminaires (downlights, ceiling lights, wall lamps, etc.) as its operation mechanism is high temperature dependent and requires a large surface area. Nevertheless, radiative heat dissipation can be employed to facilitate thermal management for high power LED luminaires which typically operate with a high case temperature and have a large heat sink. These LED luminaires include LED Street Light high bay lights, high power floodlights, and high mast lights. The heat sinks of these luminaires often receive surface treatments such as oxidizing, blacking or anodizing with the intention, which dramatically increases the emissivity of the heat sinks.

Active vs. passive

Heat sink design involves a system level trade-off as there’re many restrictions such as cost, space constraints, luminaire shape, manufacturability, and the air side conditions. Among all the heat transfer mechanisms, convection is a decisive factor in thermal management for LED lighting systems. With the advantages of a simple structure, low cost, high reliability and silent acoustics, passive cooling through natural convection is always preferred in LED system design. In most applications natural convection can be very effective and hence the term “LED heat sink” generally refers to the heat sink that relies on the thermodynamics of convection without an introduction of artificially induced force to enhance air circulation. Natural convection can be insufficient in some scenarios. Some types of LED luminaires, such as mogul-base lamps for industrial use in larger power ratings, have a small form factor but are required to produce a large lumen output. In this case, fan-assisted or other active cooling methods have to be used to increase the flow-dependent convection heat transfer coefficient.

Heat sink materials

Thermal conductivity of a heat sink is governed by its material composition, the conductive area, and the ambient temperature. Aluminum is the ubiquitous choice of material for LED heat sinks, despite the fact that copper has nearly twice the thermal conductivity of aluminum. In addition to its cost-effectiveness, moderately high thermal conductivity and high corrosion resistance, aluminum is also easily workable in mass volume using common casting, forging, extrusion and machining processes.

Aluminum heat sinks are not always made using the purest material. Aluminum alloys have been developed to address the processability issues or to enhance a specific characteristic, although the existence of most impurities will inevitably compromise the thermal conductivity. For example, magnesium is generally added the aluminum alloy for the purpose of increasing the tensile strength. The addition of copper can enhance the strength and thermal conductivity of the aluminum heat sink. Adding silicon enhances the fluidity of molten aluminum alloy at the time of die casting. A small amount of iron helps prevent dies from being fusion-bonded with the aluminum alloy.

Some heat sinks come with a ceramic or steel construction. Ceramics have thermal conductivities similar to aluminum and its alloys. What appeal to the lighting industry are their high dielectric constant and low manufacturing cost. The challenge of using ceramics is that they’re brittle and require extra handling precautions. Steel heat sinks are typically found on fixture-as-heat-sink LED lighting systems such as troffers and linear high bay fixtures. The housing of these fixtures are typically fabricated from die formed cold rolled steel. Stainless steel, which provides a very stylish aesthetic and is corrosion resistant, also finds its application in fixture-as-heat-sink lighting systems. However, both cold rolled steel sheets and stainless steel are less conductive than ceramic and aluminum (16-24 W/mK for stainless steel, 30-67 W/mK for carbon steel).

Boundary design

The convective removal of waste heat depends on the boundary conditions including, the effective surface area, the geometry of the heat sink, velocity of the air flow, and the orientation to gravity. The greater the surface area a heat sink has, the more convection occurs. For passive heat sinks to perform to their full capacity, it’s critical to maximize convection surface area. The design of a heat sink, however, is often limited by the size and shape of the lighting system. A passive heat sink commonly takes full advantage of the three-dimensional geometry to increase the convective heat transfer coefficient. Heat sinks typically come designed with fins to effectively increase surface area while allowing the heat sinks to remain confined to a given footprint. Fins are arranged in parallel to the airflow direction. The fin spacing is made to be sufficiently large in order not to stagnate or obstruct air flow.

Modern LED heat sink design has a trend toward a visually clean aesthetic and an aerodynamic design. Not only fin densities and depth are greatly reduced, an increasing number of designs seamlessly blend fins into the main metal structure to deliver a smooth minimalist appeal. The aerodynamic design allows a heat sink with low fin densities to capture as much airflow as possible. Some heat sinks that already come with an adequate surface area completely eliminate fins so as to resist dirt and dust deposits. Dirt and dust trapped in the pin or plate heat sink fins of conventional high bay lights and street lights are extremely difficult to clean. Accumulation of dirt and dust can significantly impair the convection and radiation efficiency of a heat sink.

Manufacturing Processes

The manufacturing process is an aspect of indispensability in the selection of thermally conductive materials and the design of heat sinks. Different processes can create different part geometry, render different thermal characteristics, and yield different mechanical properties. Heat sinks can nowadays be fabricated using variety of metal-forming approaches such as casting, forging, extrusion, machining, stamping, skiving, and bonding.

Die casting Aluminum heat sinks are made by forcing molten aluminum into a metal die which consists of two die halves locked and held together by hydraulic pressure. This process can produce aluminum heat sinks with highly complex shapes found in plastics while operating effectively in high ambient environments. Die castings are characterized by high dimensional accuracy and stability even with thin walls. Smooth or textured surfaces can be easily created and require a minimum of surface preparation prior to plating, coating or finishing. Die casting is the most efficient, cost-effective mass production process for LED heat sinks. It allows production of geometrically challenging finned heat sinks without compromising thermal integrity. Die castings have varied thermal conductivity depending on the compositions of aluminum alloys. ADC12, a silicon based alloy, has a thermal conductivity of 96 W/mk. Zi based alloys (e.g. Zamak 3) offer thermal conductivities in the range of 105-113 W/mK.

Cold forging is a metal-forming process by which a metal material is plastically deformed below its recrystallization temperature (usually at room temperature) under a massive application of pressure. Cold forgings win out in thermal conductivity, mechanical strength, dimensional accuracy, surface quality, manufacturing cost, and productivity over many other process. The process allows favorable crystal grain flow and thus results in improved thermal performance. Cold forged heat sinks typically yield a thermal performance improvement of up to 15% over the extruded heat sinks and up to 80% over the die cast heat sinks. With minimal resistance to deformation and high plasticity, aluminum and its alloys are well suited to this process. Cold forged heat sink using aluminum alloys in the 1000 range have thermal conductivities ranging from 220 W/mk to 240 W/mk. Cold forged 606x (e.g. AL6063) aluminum alloys have a typical thermal conductivity of 200 W/mk. The thermal conductivity of the cold forged 7xxx range varies between 115-222 W/mk.

Extrusion Aluminum is another common heat sink manufacturing process wherein aluminum flows plastically under compressive forces into a variety of shapes. Complex 2D profiles can be extruded through a die orifice and is then cut into various lengths. This process does not produce internal porosity that can affect thermal conduction and therefore is capable of producing aluminum heat sinks with higher thermal conductivity than die castings. Aluminum extrusions made from 6xxx alloys offer thermal conductivities in the 200-215 W/mK range. Aluminum extrusions are mostly used to create linear lighting systems for cove lighting, under cabinet lighting, and other architectural lighting installations wherein LED strip lights serve as the light source. Low profile heat sinks with very complex cross-sections can also be made using this process.

Stamping Aluminum is a cold-forming operation for creating sheet metal parts. Metal stamping is accomplished by insertin
g flat metal sheets into a die and using various metalworking techniques to form the metal into the desired geometry. The metalworking techniques most commonly associated with stamping include punching, blanking, deep drawing, pressing, embossing, bending, and flanging. This process is primarily employed to make stake fins and insert fins. Stamping can expand the scalability of heat sinking solutions from a few watts easily up to several hundred watts. This cost-effective process is capable of producing large-scale, full-sized runs.

Bonded fin Aluminum heat sinks are designed to maximize fin densities and depth so as to provide a high volume of convective heat transfer. The heat sink is constructed in such a way that a high density array of plate fins are assembled into a grooved base. A bonding agent, which can be a thermosetting thermally conductive epoxy or a solder, hold the plate fins tight in place. Despite the use of thermally improved bonding agent, there’s still interface resistance between the fins and base. Bonded heat sinks are available with a wide range of material and fabrication options. Hybrid heat sinks combining different materials and metalworking processes for the fins and base can be accommodated by this solution. The grooved base can be extruded, die cast or machined. The plate fins can be extruded or stamped. Either aluminum or copper can be used to fabricate bonded fin heat sinks.

Skived fin heat sinks are carved out of metal blocks. Unlike bonded heat sinks which assembly plate fins into slots on an extruded or machined base and the fins are held in place by a bonding agent, there is no interface resistance in skived fin heat sinks as they’re are constructed from a single piece of aluminum or copper. The skiving process enables a high aspect ratio (taller fins and higher densities). These thermal characteristics allow skived fin heat sinks to deliver high performance thermal management. However, skiving process is not an economically viable solution for mass production of LED heat sinks.

Machined heat sinks are similar to the skived type in manufacturing process except for these heat sinks are machined out of a metal block by gang saw cutting. Both the machining and skiving processes consume raw materials in an unproductive manner and are therefore less frequently used as LED heat sinks. The only good with machined heat sinks are their short lead time for small batches and high thermal conductivity as a result of low thermal resistance throughout the construction.

LED Heat Sinks, LED Light Fixture Heat Dissipation Technology最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

So you are not a lighting engineer or a horticulturist to have an instinctive ability to know the best requirements for outdoor lighting. But you need to know if buying the new LED lighting luminaire justifies its upfront cost. Is it really better than the old sodium street lights you’ve grown up with?

Today, LED street lights are mainstreaming worldwide. Everyone wants to shift to greener alternatives, zero electricity costs and less carbon footprint.

So whether you’re an expert lighting professional, a contractor, a building manager or a homeowner wanting to know more about LED lighting versus HPS lighting, this article is for you.

In this blog, we have laid out the differences in characteristics, performance, efficiencies, costs and warranties of LED and HPS street lights. Read on!

What is a High Pressure Sodium (HPS) Street Light?

High Pressure Sodium (HPS) street lights are one of the most common street lights you can see today. They produce a distinctively yellow-orange, monochromatic glow.

You can still see many HPS lights for lighting large areas, manufacturing sites, roadways, parks, and parking lots. They are also commonly used as grow lights for plants. But today, HPS street lights are quickly being retrofitted with more efficient and eco-friendly LED lights.

What are the Advantages of an HPS Street Light?

If you’re wondering why a lot of HPS lights haven’t been taken down today, this is because they still present some benefits to the community. Here they are.

• Among the other types of street lights, HPS is the most efficient (about 7 times more than incandescent lights, 2 times more than mercury vapor lights).
• Quicker warm-up time than other lamp types (3 to 4 minutes) like mercury vapor and metal halide.
• Longer lifespan (24,000 hours).
• Cheaper price
• Higher lumen efficiency than older street light types.
• Wide variety of lighting brightness and power ranging from 35 to 1000 watts.
• Great for growing plants.

What are the Disadvantages of an HPS Street Light?

But HPS street lights don’t come entirely clean. Here are the drawbacks.

• Does not accurately reflect the true color of objects.
• Needs a transformer/ballast for voltage and current regulation to assist start up and operation.
• Requires a few minutes (5 to 10 minutes) before reaching full light brightness.
• Needs one minute to cool down.
• Produces reddish color at the end of its life
• Burns at the end of its life.

Now let’s move on to the newest type of street lighting today.

Best Uses of HPS Street Lights

Since HPS street lights have high intensity lights, they are best for tall mounting applications like for industrial lighting and security lighting. They are the best options when you need to mount street lights with 15 feet and above heights.

They are not suitable for applications needing high color rendition accuracy, like in retail and commercialize lighting. HPS lights would do poorly on projecting the colors of objects with high precision. If street lights are to be switched on and off frequently, HPS lights are also not appropriate for the job. This is where LED street lights are best at.

What is a Light Emitting Diode (LED) Street Light?

An LED street light is a better street lighting option which is highly preferred in today’s struggle towards green living. This is because integrated LED street lights are more energy-saving than other outdoor lights, requiring less maintenance and operation costs.

In fact, they are 50% more efficient than traditional sodium street lights, and can last 20-25 years. This is why majority of the world are shifting towards LED outdoor lights.

LED lamps produce a distinct bluish white glow. Newer LED street lights can produce amber-colored hue or yellow-warm colors which are more animal-friendly with the least light pollution.

What are the Advantages of LED Street Lights?

• Longest lifespan compared with other street light types (50,000 to 100,000 hours)
• Least heat emission
• Directional light (over 180 degrees, unlike other lights with 360 degrees light direction)
• Easy warm up, and switching on and off
• Doesn’t emit ultraviolet rays unlike HPS
• Low maintenance costs
• Low operation cost
• Used for smart solar street lights, where brightness can be automatically adjusted

What are the Disadvantages of LED Street Lights?

• A little expensive upfront

Best Uses of LED Street Lights

LED street lights are best outdoor lighting applications requiring high color rendering accuracy. They can be used for both retail, commercialized and industrial lighting.

Today, you can find solar street lights, LED street lights, All-in-One solar street lights and adjustable LED street lights the best choices for smart, energy efficient and low cost solutions.

Smart LED street lights are equipped with automatic dimming and brightness and you can set different lighting modes depending on your area’s requirements. They are also highly recommended for parks, parking lots, roadway lighting, pathway lighting, pedestrians, gardens, and many more.

Difference Between LED and HPS Street Light

Here, we present the different characteristics of HPS street lights and LED street lights.

LED and HPS Showdown

Can You Replace High Pressure Sodium Bulb With LED Bulb?

Yes you can! You simply need to know the wattage of the existing HPS light bulb and know the amount of light brightness in lumens. Then find an LED bulb that can deliver the lumens required.

Here’s a sample High Pressure Sodium to LED Conversion Table:

For example, you have a 400W HPS light bulb and you want to replace that with an LED light bulb. This means, you can use a 120 Watt LED bulb with 18,000 lumens to replace your 400W HPS light bulb.

Conclusion

From the above analysis, we can now conclude that LED street lights are far better than HPS street lights in a ton of ways.

Cost efficient. Check! Higher and faster ROI. Check! Energy efficient. Check! No apparent pollution created. Check! Smart, innovative and convenient. Check!

Did this definitive analysis enlightened you to switch to outdoor LED lights? Are you willing to replace your existing high pressure sodium street lights with LED street lights?

Depth Analysis of LED Street Light Vs HPS Lamp

A factory in road lighting design project, through a detailed program of research and investigation, the whole plant road lighting for the project all use the LED light source. The basic situation of the project are as follows:
（1）Project Location: North China.
（2）The total length of the road the whole plant: about 9km.
（3）Road width: 9m.
（4）Street light pole height: 8m.
（5）Street pick arm length: arm 1m.
（6）Street maximum spacing: 30m.
（7）Street layout: single-row layout.

As a new type of light source, the initial application of industrial lighting project, we must make them irreplaceable research, so the road lighting design, respectively, for the high pressure sodium lamp and LED light source. Contrast the different design of light source , we hope to get the truth results of the feasibility study.

Table 1 shows the design data, according to the data in Table 1 can be obtained from the illumination analysis and economic analysis respectively and get a reasonable conclusion.

Illumination Analysis: Philips Calculux Road software was used to make a street light design model, the report as following:

According to the results of software analysis reports can be obtained illuminance value: 120W LED street light, light height 8m, 30m spacing in the next, on the road 9m wide, ground maximum illumination 51.8lux, minimum illumination of 12.8lux, average illuminance 25lux ; 250W high pressure sodium street light, light height 8m, 30m spacing in the next, on the road 9m wide, ground maximum illumination 60.3lux, minimum illumination of 12.1lux, the average intensity of 29.7lux. According to the industry and the national standards, the plant trunk roads must not drop below ground level illumination 10lux, so whether it is 120W LED street light or 250W high pressure sodium street light on the illuminance values meet standards.
Economic Analysis:

According to Table 1 “LED light source, high pressure sodium light source design data comparison”, Economic analysis can be obtained as shown in Table 2 results:

As can be seen from Table 2, due to the high price of LED street light, the first purchase costs are 40 percent more than high pressure sodium street light, less than half of high pressure sodium light source LED street light energy consumption costs higher, according to consider running for five years , LED light source is still higher than the total cost of high pressure sodium light source to nearly 10 percent. This shows that in the short term in the cost of LED lights still at a low level.
However, in the interest of the economy at the same time, we can not ignore the rigid demands of energy conservation. From the international environment, climate change, energy security and other global issues highlights, low-carbon economic development has become the strategic high ground. From the domestic situation, the Chinese government promised that by 2020, carbon dioxide emissions per unit of GDP fell from 40% to 50% higher than in 2005, which also requires a strenuous effort. Meanwhile reduction targets established in the industry is also clear that the total amount of 5 million tons of standard coal to achieve energy “Twelve Five” period, the overall energy consumption yuan output value of industrial enterprises reached 5.8 percent decline. As can be seen from Table 2, the choice of LED lights in five years can reduce carbon dioxide emissions of more than 600 tons, equivalent to saving more than 240 tons of standard coal, although this more than 240 tons and 5 million tons of goals far, but a short step a thousand miles 500 tons goal is to accumulate up by a little bit of emissions, use of LED lights is the link which can not be ignored.

Depth Analysis of LED Street Light Vs HPS Lamp, LED vs HPS Street Lights, Which is Better最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

The IK level is an internationally accepted digital code used to indicate the protection level of electrical equipment enclosures against external mechanical collisions. For outdoor equipment, whether it is suspended, buried in the ground or placed outdoors, it needs to have corresponding IK requirements. According to the standards of IEC 62262:2002 and IEC 60068-2-75:1997, it is the protection ability of the electrical equipment shell to the internal equipment when it is impacted by external force. For LED lamps, it is simply whether the internal circuit of the lamp is dropped or impacted. Is it still working properly if it is damaged? In the lighting industry, it is necessary to make IK protection levels for outdoor flood lights, street lights, stadium lights and some special lights. After all, the use environment of these outdoor lights is often harsh, and it is necessary to check whether the protection level of the lighting product shell Meet industry and national requirements. Usually we use a spring impact hammer or a free fall pendulum to hit the lamp to determine its IK rating. The unit of IK rating is Joule.

So what are the IK ratings that we often use for led lighting?

In the IEC62262 protection level code, it consists of two numbers, namely IK01, IK02, IK03, IK04, IK05, IK06, IK07, IK08, IK09 and IK10. The 10 levels are divided into two groups of tests according to different levels of testing: the first group is the spring impact hammer test from IK01 to IK06. This group of tests has relatively small energy (from 0.14J to 1J) and is generally suitable for Indoor LED lamps such as downlights, high bay lights; the other group is a large pendulum test from IK07 to IK10, the test energy is larger (ranging from 2J to 20J), suitable for street lights, stadium lights, explosion-proof lights IK level test.

Each set of IK Code numbers represents a different anti-collision energy value. See the corresponding relationship between IK Rating and its corresponding collision energy f in the table below.

IK Rating chart:

In the LED lighting industry, general customers have IK Rating requirements for outdoor lighting and industrial lighting, so what are the corresponding IK ratings?

UFO LED High bay lights: IK07/IK08 Outdoor LED Stadium lighting, High mast light: IK08 or above

LED Street lights: IK07/IK08 LED Tri-proof batten: IK06/IK07; LED Explosion-proof lighting: IK08 or above.

What is IP Rating ?

The IP Rating describes the enclosure for electronic equipment according to the definition of the European Committee for Electro Technical Standardization.

IP is standing for Ingress Security, the security of the product versus ecological effects like strong things or fluids. The IP rating includes two figures which are describing the height of the protection versus these effects. The larger the number, the greater the protection.

First Digit – Solids Protection

The first number tells you just how well safeguarded the fixture protests solids– such as dust. The higher the number the more protected it is.

Second Digit – Liquid Protection

The second number is utilized to tell you about the degree of fluid protection: 0 being no protection as well as 8 being the highest offered level of protection.What is the connection of IP rating to LED luminaires?

IP Rating Table

What is the connection of IP rating to LED luminaires?

The short article “LED Life Cycle– Impacts” explains a lot of points that require to be considered when creating a long- life efficient LED system with high ecological benefits.

Humidity is one factor for metal parts, links and also electronic gadgets to get damaged really quickly. They begin to wear away, so it is better to shield the LED system very carefully against humidity.

A lot more mindful choices need to be made for atmospheres like coastal environment, manufacturing facilities that are creating chemicals along with indoor pool.

However, the instant requirement for an IP rated fixture really is 2 layer – the capability to ward off water and also the capacity to not allow dirt to enter inside.

Protection from water intrusion is essential for all outside fixtures, or those components inside your home that need to be washed down or are mounted in an extremely humid environment.

Maintaining the interior mechnasisms of the light completely dry is really important. Without a strong IP certification to protect it, lights would fall short.

The 2nd application is for exceptionally messy settings.

Thinks of a grain storage space facility where dust is prevalent. Keeping dust from going into the lighting fixture is necessary as to stay clear of scenarios where a stimulate might be presented to the dust as well as create an explosion.

We have actually all seen the results of a violent dust explosion, so where safety and security is critical in a dusty atmosphere, make sure the fixture is capable of keeping the dust out

(As an aside, some atmospheres call for surge evidence fixtures, so never ever replace the need for an explosion evidence component with one that is only IP rated).

Sample Areas and Suggested IP Ratings 

What is IK Rating for LED Lighting? What is IP Rating ? IK08 for LED Street Light最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

1. Battery:

The input energy of the solar photovoltaic power generation system is extremely unstable, it is generally necessary to configure battery street lights to work. The main function of the battery is to store and release electrical energy. During the day, the electric energy converted by the solar photovoltaic module is stored, and at night, it is discharged under the command of the controller. Commonly used solar street lamp batteries include lead-acid batteries, gel batteries and lithium batteries. High-performance batteries should have the following advantages: enough cycles of charge and discharge, low self-discharge rate, long service life, strong deep discharge capability, and high charging efficiency. Usually installed on a light pole or buried in the ground, the function of the battery box is to protect the battery in the ground, and the battery will not be corroded by groundwater. Lithium batteries are now the first choice of most solar street light manufacturers, with long lifespan and no pollution.

2. Light source

At present, the commonly used light sources of solar street lights are low-pressure energy-saving lamps, low-pressure sodium lamps, induction lamps, and DLED light sources. Low-pressure sodium has high lighting efficiency (up to 200Lm/w), but it is expensive. LED light source, long lifespan, up to 50,000 hours, low working voltage, suitable for solar street lights. The luminous efficiency is higher, and as technology advances, the performance of LEDs will be further improved. Low-voltage energy-saving lamps have low power and high luminous efficiency, but their service life is only 2000 hours. The induction lamp has low power and high light efficiency. But the voltage is not suitable for solar street lights. High quality solar street lights equipped with led light source would be better for illumination.

3. Solar panel

Commonly used solar panels are generally divided into two types, monocrystalline and polycrystalline. Its function is to convert solar energy into electric energy that can be stored in batteries. The conversion rate of monocrystalline solar panels is 17%, and the conversion rate of polycrystalline solar panels is about 12%. The solar panel should face the sunlight, so the solar panel can fully absorb the solar light and generate electricity. If the solar panel is blocked by the trees or the solar cell surface is covered by leaves or dust, there will be no enough electricity.

4. Controller

The solar street light controller is an indispensable part of the solar street light system. It is the control core of the solar street light. It connects lamps, batteries, and solar panels in series to make the entire system work normally. The controller has four main functions, the first one is to limit the voltage of the input battery. The second function is to increase the voltage when there is no voltage output, so that the battery can reach a level that can light up. The third function is to control the output period, and the solar street light will turn on at the set time. The fourth function is to adjust the output power, such as adjusting the power of the street light to 20W in the early morning and 100W in the evening. The choice of solar street light controller mainly considers three points: the power of the battery panel, the voltage of the system, the type and power of the lamp. You must clarify these three points before you can choose a suitable controller.

5. Heat sink shield (housing)

Solar Street Light Housing install can be adjusted according to different environments or illumination needs.

and waterproof IP 65 for Protect battery, LED Sources.

Solar energy is inexhaustible, clean and pollution-free, and it is a renewable green energy source. It has many advantages that other conventional energy sources do not have, and is considered the most important new energy source in the 21st century. With the continuous development of outdoor lighting industry technology, solar street lights will be accepted by more and more customers. If you want to invest the solar street light and don’t know how to configure the street lighting system, feel free to contact us. We will provide the most thoughtful suggestion.

SKD for Solar Street Lights; What is Solar Street Light Parts?最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

Advantages of LifePO4 lithium battery最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

Understanding these technical terms will help you understand the issues related to the quality of the light offered by LED devices, CFLs and Bulbs and decide if you really should pay a premium for a better Color Rendering Index (CRI) product.

Understanding the Light Spectrum

Good quality light is made up of different colors of light. The multi colored rainbow is seen when light is split by small water drops acting as prisms. “VIBGYOR” is a short version of the different colors constituting white light. You can create your own rainbow by using a compact disc. When you hold a CD towards light the prismatic layer of the CD breaks up light into its constituent colors and you can see all the colors constituting light.

Violet, Indigo, Blue, Green, Yellow, Orange and Red are the visible colors of light. Red is the least energetic and violet light is the most energetic of the lot. A spectrum also contains invisible light. As their names suggest – Infra Red light comes before red light and Ultra Violet comes after violet.

A good source of light like LED bulbs produces full spectrum light i.e., light with all colors. Human beings do not need Infrared or UV lights as they cannot be seen by our eyes. In fact both Infrared and UV light may damage art objects and paintings in your house.

The spectrum of UV, visible and IR light radiation. For lighting purposes it is only the colored portion of the spectrum that is important. IR and UV lights can damage art objects. Besides art objects, UV light also harms the skin. Incandescent bulbs produce 95% of their output in the invisible infrared range making them highly energy inefficient..
LED Street Light, Solar Street Light, High Mast Light, LED Flood Light, Our products CCT>80

How Do We See Colors?

White light has all the different light colors in almost equal proportions. When white light strikes an object, most colors of light are absorbed and a few are reflected. The color of an object is determined by the color of light it reflects. It is important that a light source emits light with all the colors of light in it.

If light from a source does not have a particular color of light, objects of that color cannot be seen in their natural colors. This is why sodium lights are so bad at reproducing colors. Sodium light is what is called a narrow spectrum light. It is made of primarily yellow light. When an object of a color other than yellow is placed under sodium lights different shades of yellow are the only color that is reflected and almost every object has a sickly hue. LED products produce natural colors as the light is well balanced and contains an optimum spread of all light colors.

Lighting Devices and Light Spectrum

Warm yellow light produced by an incandescent bulb has light of all colors but is slightly poor in green, blue and violet lights. Therefore when green, blue or violet objects are seen under an incandescent bulb’s light the colors are not reproduced faithfully. LED’s by contrast produce a complete, well balanced spectrum of light and natural colors of objects are reproduced.

• Sodium lights have a very poor CRI of 25,
• Mercury lights weigh in at 50 and
• HID have a CRI of 72.
• The CRI of CFLs and LED lights vary with light color but generally lie between 75 and 85.

It is pertinent to note here that the CRI of a light source is comparable across sources that work at the same temperature. LED lighting works at very low temperatures compared to an incandescent bulb. Thus the CRI of 85 under estimates their performance. Plans are afoot to take another look at the CRI standard to reflect the reality of the lighting world.

Light Spectrum and Color Rendering Index

The Color Rendering Index is a measure of how faithfully light from a source will reproduce colors. Incandescent bulbs have a CRI of 100 – which is taken as a perfect score.

Incandescent light is the light source with the best CRI. It serves an index of 100 because the spectrum provides all wavelengths. An incandescent light bulb can be compared to the sun, the sun is our natural light source having an CRI of 100 too. CFLs normally provide a CRI 80.

That is the single most important reason that CFLs have not been able to replace the incandescent bulb despite heavy promotion. There are CFLs that produce warm light. But to produce a warm light the glass coating of a CFL has to be suitable doped with additives that essentially absorb light in one part of the spectrum and emit light in another part. This further reduces the lighting efficiency of CFLs.

LED products and systems are in a different league altogether. If you look at images produced by a LED projector, the vibrant colors reproduced and its superiority over two centuries old incandescent technology becomes apparent. LED light sources are among other light sources superior in lighting effciency and quality.

If you look at the history of lighting, the first electrical and popular wide-spread lamp has been the incandescent one. Other light sources that followed took advantage of newer technology background as well as other possibilities of producing light. Each light source is different, with advantages as well as disadvantages and it is just natural that older light sources will phase out because others are better than the old technology. LEDs are anyway the best lighting source you can get right now for many applications.

Visual tests have shown that the definition of the CRI needs to be reviewed. Scientists asked observers to rate color schemes, which are used to define the CRI of a lamp, under different light sources. The comparisons of LED with lamps of a higher CRI have been surprising.

The observers had the visual impression that both light sources would be equal in lighting quality, although the LED had per definition a worse CRI. One needs to know that the definition of the CRI has been taken part within the time of the invention of discharge lamps. Regarding the basis of the color rendering index, the testing method is taking into consideration 14 different standardized colors.

But only the first eight colors of the reference color scheme are taken into the calculation of the CRI, surprisingly that are pale pastel colors. Now that standard itself is under scrutiny. There is a debate to change the standards to reflect the reality of today’s lighting technology.

What is Color Temperature?

The term color temperature describes the temperature of objects by which they emit light, modeled through the “black body radiator”. When increasing the temperature of a “black body”, it starts to emit visible light in a continuous spectrum. The filament of a 60W incandescent lamp heats up to about 3000°F, as a result the lamp emits light with a color temperature of 3000K. Many of our artificial light sources do not create light by heating up a material until it glows like an incandescent lamps. Instead of creating a continuous spectrum, they generate an assortment of color emission lines. A black body color temperature cannot be directly given to this non-blackbody type of emission, generated by high intensity discharge and fluorescent lamps for example. 

What is Correlated Color Temperature?

For those light sources, a correlated color temperature (CCT) is indicated, based on the black body color temperature. A cool white fluorescent lamp has a CCT of about 5000K. The lamps light spectrum is different from a black body one but has the same temperature.The light color influences the atmosphere in a space. The more cozy the ambiance the warmer the light color (lower color temperature) should be and the more dynamic the scene the cooler the light source (higher color temperature).

The CRI is the most important factor to watch when choosing light sources. How good is the light source representing faces, colors and contrasts? The easier the visual task and perception the lower the CRI can be. The color temperature needs to be watched second, it is supporting the space’s atmosphere.

How Does CRI Affect My Purchase Decision

So how much CRI do you need? It really depends who you are. Are you a retail store like the Gap or Bed Bath and Beyond? Are you a car dealership? Are you a hospital that wants to replace your parking lights? Are you a factory, a warehouse or a school? or for roadway lighting, need solar street light, led street light? Different businesses and facilities all have different needs.

If you are a retail shop selling to consumers, high CRI is good. 80+ is preferred. 85 is great, even 90. If you are a not a retailer, then 70+ will be just fine. But can you visibly see the difference between 70 CRI and 90 CRI. Then answer is yes, if you know what to look for.

At a recently lighting trade fair, we walked into a booth that displayed a series of glass bowls of colorful gumballs. Each bowl was under a LED light, and the CRI of that light was labeled above the bowl. We walked from the 70 CRI display all the way to the 95 CRI bowl and thought to ourselves “We’re not seeing the difference”. So then an engineer walked up to me as we kept on walking from bowl to bowl and he told me to “Look at the red gumballs”. And sure enough, the red gumballs became brighter and more vibrant as the CRI increased. The other colors seemed similar from one display to the next.

So, as a factory or a warehouse manager, do you care if the reds in your warehouse are not as vibrant under 70 CRI than under a 95 CRI light? Are you prepared to pay more for that difference? Probably not. If you own a clothing store, then you probably want the best quality of light available.

Comparing LED to Metal Halide and High Pressure Sodium

This is many ways is not even a fair fight. Especially when you compare High Pressure Sodium to almost every light source available on the market today. High Pressure Sodium CRI is somewhere between 20 and 40. The color temperature is somewhere around 2300K, so what you have is a very warm (yellow) light that tends to discolor everything.

Did you notice how everything under a HPS light looks yellow? That in fact, is the perfect example of poor CRI. Good CRI makes colors look as they should appear, bad CRI discolors everything.Metal Halide fairs better. Its CRI is much better than HPS, but typically lower than LED. So the light quality of Metal Halide is not as good as LED.

In fact something else happens with Metal Halide bulbs. A brand new Metal Halide bulb is very bright right out of the package, but every one knows it loses it lumens very quickly. Within the first 6 months of use (assuming 12 hours a day), the lumens can drop as much as 20%. By the time the light is 50% though its 15,000 hour life, it can lose as much as 50% of its initial lumens. But what is less known is it appears that Metal Halide loses its CRI effectiveness as lumens depreciate.

So not only is the quantity of light dropping, so is the quality of light. Its a double hit on the amount and usefulness of light. It appears Metal Halide bulbs are like fireworks. Bright to start, but fizzle out quickly.So in the world of HID lighting, not only does it make sense to replace these lights with LED because of the dramatic and significant savings available when you convert over, but the quality of light will also improve.

In summary, the most important thing to remember about CRI is that you should think about the application that the lights are going to be used for. The majority of installations do not need to purchase higher cost high CRI lights. But when the need arises, they are available for those applications that need to make product or colors stand out.

Color Temperature Chart:

The color temperature map reflects the changes in color on the Kelvin color scale caused by changes in degrees Kelvin.

Color temperature charts range from 1000K to 10000K and show values in degrees Kelvin.

Typical color temperature：

1800K – Candlelight

2500K – Sunrise and Sunset

3000K-bulb

3500K – Morning or evening sun

4000K-Moonlight

5500K – Noon Sun

6500K – cloudy sky

10000K – Clear Sky

LED lighting color temperature：

1500K~1800K-candle

1900K~3500K-warm 

Some city street road choose it; 

3600K~4500K-Natural color;  main High Mast Light, LED Flood Light choose it.

4600K-5500K-cool;   main LED Streetlight choose it.

5600K~6400K-Cool Daylight

6500K+ – Ultra Daylight

How to choose the right color temperature?

There are various properties to consider when choosing the right color temperature or even RGB color variation. The first factor is the type of space in which you want to place the lighting. Second, you need to identify the main goal of lighting that particular space.

It’s also important to start by assessing the amount of natural light that already exists in the area, what spaces are currently being used, and what ambience you want to create with the illuminance.

Tips to Consider:

• Create an atmosphere 
• the purpose of the room
• room interior style

Suggestions:

• Office/Workspace: Workspaces require bright lighting to create an atmosphere of focus, alertness, and productivity. In such setups, neutral LED lighting with a color temperature of 4000K is recommended. These are the most common types of LED lighting in office spaces due to their versatility and ability to serve multiple purposes.

• Bedroom: This space is basically designed for comfort and is used to relax and unwind in a private setting. Bedrooms have a strong connection to their occupants because of the impact they have on their occupants and their relationship to the style and interior of the room. Therefore, it is natural to choose a comfortable and warm color temperature lighting for this space, usually between 2700K-3000K.

This range communicates directly with a human’s light sensor and can detect the difference between bright sunlight and warm tones, which means the day is coming to an end.

Warm color temperature LED lights prepare the brain for a good night’s sleep. A warm-light bedside reading light is also recommended for nighttime directional reading.

• Dining Room: Choosing the right color temperature LED light for a dining room is crucial because it creates an atmosphere and creates a specific ambience.

• High-end restaurants: High-end restaurants recommend warm color temperature LED bulbs in the range of 2500K-3000K to create a relaxed and pleasant dining experience for customers. Different values can be used depending on the purpose of the space, while keeping the values within a warm range to ensure clients feel at home and guaranteed comfort.

• Fast food restaurants: On the other hand, customers in fast food restaurants are not looking for ambience or environment, they usually grab a quick bite and continue with their daily activities. Fast food restaurants recommend warm colors, but higher values than fine dining restaurants, between 2700K-3000K. This range still guarantees customer comfort, but does not give customers the relaxed feeling of a long stay, as the space is designed for short-term visits.

• Hotels: It is recommended that hotels, especially hotel rooms, have a color temperature in the range of 2700K to 3000K to replicate lighting in clients’ homes, making it easier for occupants to relax and fall asleep. Lobby and hallway can be lit at the same brightness to maintain a warm feel throughout, or with brighter or neutral color temperatures to enliven public spaces. 

What is Color Rending Index and Color Temperature (CRI / CCT)最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

For LED Street Light luminaires application, MEANWELL officially releases the new generation waterproof LED driver series—XLG series. The whole XLG series, which has been highly expected by the market, covers from 25W to 250W. It can be used for LED Bay light / LED Street light / Horticulture lighting and flood light applications. XLG series applies the constant current and constant power design, which remarkably enhances the convenience of integrating model selection. The design of XLG Series makes the model selection easier and reduces the pressure of stock.

The new XLG-50 and XLG-240 series are the two series launched. These products adopt most of features from the previous ELG series. XLG series are the same metal housing design with only 2/3 length of the ELG series. The AC input range is from 100 to 305V, avoiding the problem of derating the input range. The products have also certified with safety certificates (CUL/CCC/CB/CE/ENEC/RCM/BIS/KC/PSE) and are suitable for globally certified cables. Other features include a wide working temperature range (Tcase: -40℃~90℃) and a three in one dimming function to meet needs of different industrial environment. Moreover, XLG-25 and XLG-50 series are equipped with input over voltage protection function for the India market.

• Wide input range 100~305V AC
• Constant power mode with adjustable output current
• Built-in active PFC function and Efficiency up to 90%
• 3 in 1 dimming function
• Protections: Short circuit/Over voltage/Over temperature
• Surge protection with 6KV(L/N-FG)/4KV(L-N)

• Full power at 70~100% operation (Constant Power mode)
• 5 years warranty

In response to the miniaturization trend of the lighting fixture design, MEAN WELL R&D team expertly designed the XLG series, with a reduction of dimension. In terms of safety certification, MEAN WELL included safety regulations of RCM (Australia), BIS (India), PSE (Japan), and KC (Korea) in the standard version of the product, helping customers to increase selling areas without worrying about safety regulation barriers. For dimming function, XLG series provides three-in-one dimming to meet the latest IEC61347/UL8750 and GB7000.1 design requirements. Isolation between output and dimming cables are added to ensure the safety of usage. Other key features include high efficiency up to94.5%, surge protection (10KV/6KV) and a wide range of working ring temperature (-40 ~ +60°C).

Besides, adopting constant power and wide current range adjustable design, XLG series has other voltage output choices, such as 12V/24V output for constant voltage applications. L/M/H types output for constant current applications can fulfill customer’s demands of different LED design and usage.

12V and 24V Output Design
12V and 24V models are suitable for general indoor and outdoor lighting projects, including waterproof light strips, advertisement light boxes or a voltage sources with DMX control.

L Type Design
L type is designed for a full power operation from 700 m A to 1050 m A. The adjustable output current allows customers to adjust driver current and wattage. The wattage range covers from 25W to 240W for selection based on different forward-voltage.

M Type Design
The constant current of M type models is adjustable from 1400 m A to 2100 m A for full-power output design. The M Type is only available for 150W; however, XLG-150-M Type is available for 100W applications.

H Type Design
The H type design is a full power operate based on 56V output and provides different driver currents for different wattage usage. H Type is applicable for under 56V Forward-Voltage COB LED or SMD LED circuit, especially a perfect fit for luminaires require compliance with a SELV <60V.

XLG Series is able to reach the highest surge protection, 10k V/6k V , according to EN61547 and EN61000-4-5 regulation, suitable for any outdoor luminaire application. Another highlight of XLG series design is input over voltage protection (IOVP) which is especially for unstable AC source. When AC input is high than 320v AC, the power supply will be cut off for protection to further reduce the failure rate of luminaire.

Please check MEAN WELL’s LED driver solution website and horticultue lighting guide for more product details.

MEANWELL XLG Series Constant Power Mode LED Driver(Power Supply) for Street Lamp最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

Abstract: An LED driver is the brain of an LED lighting system. It provides power conversion, load regulation, and downstream component protection. LED drivers are also the interfaces with which sensors and wireless communication modules are integrated to enable human-machine interaction for smart lighting applications.

The development and deployment of light emitting diode (LED) technology across the entire range of lighting applications have been breathtaking over the past few years. Despite the inherent high electro-optical conversion efficiency of LEDs, an LED luminaire is only as good as its driver. The potential of this revolutionary lighting technology can only be unlocked when the performance metrics of LED drivers are consistently matched to the electrical characteristics of the LED light source. An LED lighting system is a synergistic combination of the light source, LED drivers, thermal management systems, and optics. Being the only component that characteristically influences the photometric performance and light quality of the LEDs in a lighting system, drivers play a critical role in more extensive and intensive applications of LED technology.

What Is an LED Driver?

An LED Driver is an electronic device which regulates the power to an LED or a string (or strings) of LEDs. LEDs are solid state semiconductor devices impregnated, or doped, with layers to create a p-n junction. When the current flows across the doped layers, holes from the p-region and electrons from the n-region are injected into the p-n junction. They recombine to generate photons which we perceive as visible light. The conversion from current to light output is nearly linear, increasing the input current allows more electrons and holes recombining in the p-n junction and thus more photons are generated.

In contrast to conventional light sources that runs directly from an alternating current (AC) power supply, LEDs operate on DC input or modulated square wave input because the diodes have polarity. An input of the AC signal will cause an LED to only light up approximately half of the time when the AC signal is the correct polarity and immediately go out under negative bias. Hence, a constant supply of DC electrical current at a fixed output or a variable output within an allowed range must be applied to an LED array for stable, non-flickering lighting.

LED drivers provide an interface between the power supply (line) and the LED (load), converting the incoming 50 Hz or 60 Hz AC line power at voltages such as 120 Volts, 220 Volts, 240 Volts, 277 Volts or 480 Volts to the regulated DC output current. There are drivers designed to accept other types of power sources as well, e.g., DC power from DC micro-grids or Power over Ethernet (PoE). An LED driver circuit should have immunity against voltage spikes and other noise on the AC line within a predetermined design range while also filtering out harmonics in the output current to prevent them from affecting the output quality of the LED light source. The driver is not merely a power converter. Some types of LED drivers have additional electronics to enable precise control of the light output or to support smart lighting.

Constant Current or Constant Voltage?

An electrical circuit that regulates the incoming power to provide a constant-voltage output has typically been referred to as a power supply, whereas an LED driver in the strict sense refers to an electrical circuit that provides a constant current output. Today, “LED driver” and “LED power supply” are very ambiguous terms that are being used interchangeably. Despite the terminological ambiguity, we can’t afford to neglect the intrinsic differences between the constant current (CC) and constant voltage (CV) circuit schemes for LED load regulation.

Constant current LED drivers provide a constant current (e.g., 50mA, 100mA, 175mA, 350mA, 525mA, 700mA, or 1A), regardless of the voltage load, to an LED module within a specific voltage range. The driver may power a single module with LEDs connected in series or multiple LED modules connected in parallel. Series connection is preferred in CC circuit architectures because it ensures all the LEDs have the same current flowing across their semiconductor junctions and the light output is uniform across the LEDs. Driving multiple LED modules in parallel requires a resistor in each LED module, which leads to lower efficiency and poor current matching. Most CC drivers can be programmed to operate over an output current range for precise pairing between the driver and a specific LED module. Constant current LED drivers are used when light output should be independent of the input voltage fluctuation. They are found in many types of general lighting products, such as downlights, troffers, table/floor lamps, street lights and high bay lights, for which high current quality and precise output control are the priority. CC drivers support both pulse-width modulation (PWM) and constant-current reduction (CCR) dimming. Operating a power supply in a CC mode usually requires overvoltage protection just in case an excessive load resistance is encountered or when the load is disconnected.

Constant voltage LED drivers are designed to operate LED modules at a fixed voltage, typically 12V or 24V. Each LED module has its own linear or switching current regulator to limit the current in order to maintain a constant output. It is generally preferred to provide a constant voltage supply to multiple LED modules or fixtures connected in parallel. The maximum number of LEDs or LED modules and the forward voltages across them must not exceed the DC electrical energy power supply. The CV circuit must tolerate the power dissipation when the load goes short circuit. The current limiters typically have thermal shutdown to protect the circuit when a voltage higher than the maximum allowable voltage is placed across the current limiter. CV drivers are often used in low voltage LED lighting applications that demand ease of group connection in parallel control, e.g., driving LED strip lights, LED sign modules for lightboxes. Constant voltage drivers can only be PWM dimmed.

Switched-mode Power Supply (SMPS)

As LEDs are very sensitive to current and voltage fluctuations, one of the most important roles of an LED driver is to reduce variations in forward voltage across the semiconductor junction of the LEDs. Switched-mode power supplies operate by modulating an electrical signal using one or more switching elements such as power MOSFETs at a high frequency thereby generating the predetermined magnitude of DC power under supply voltage or load variations. Switch-mode converters used in LED drivers require energy to be stored as current using inductors and/or as voltage using capacitors so as to maintain the output current or voltage on the load during the on/off switching cycle. An AC-DC SMPS LED driver rectifies AC power into DC power which is then converted into DC power capable of driving the LEDs properly.

For the switched-mode power conversion in LED drivers, various circuit topologies are available to support the LED load requirements. Among all SMPS topologies, buck, boost, buck-boost, and flyback are the most commonly used types.

Also known as a step-down converter, a buck circuit regulates input DC voltage down to a desired DC voltage using a number of current control methods, including synchronous switching, hysteretic control, peak current control, and average current control. The buck topology is designed for mains-powered LED drivers which are required to drive a long string of LEDs, with the load voltage kept under the supply voltage. Buck circuits are also frequently found in low voltage applications where the input supply voltage is relatively low (e.g., 12 VDC for automotive lighting) and just one LED is being driven. The buck topology allows for circuit design with fewer component counts while maintaining a high efficiency (90–95%). However, the load voltage of a buck circuit must be less than 85% of the supply voltage. Moreover, buck LED drivers do not offer isolation between the input and output circuits.

A boost converter is designed to step up the input voltage to a higher output voltage by about 20% or more. Boost circuits generally require one inductor and operates in either the continuous conduction mode (CCM) or discontinuous conduction mode (DCM), as determined by the waveform of the inductor current. Low-power boost converters can use a charge pump, rather than an inductor, which uses capacitors and switches to raise the output voltage above the supply voltage. Inductor-based converters offer the advantage of low component counts and high operational efficiencies (greater than 90%). The disadvantage of this topology is that it offers no isolation between the input and output circuits. Boost converter outputs a pulsed waveform and thus requires a large output capacitor to reduce the current ripple. PWM dimming is challenging with the large output capacitor as well as the closed-loop control which demands a large bandwidth to stabilize the converter.

Buck-boost converters can provide an output higher or lower than the input voltage, making them ideal for applications where the input voltage rises and falls with a large variation (no more than 20%). Input voltage fluctuations of this type usually occur in battery-powered lighting applications, e.g., vehicle-mounted lighting for construction and agricultural machinery (forklifts, tractors, harvesters, diggers, snow ploughs, etc.) as well as trucks and buses. Two types of converters often found in buck-boost applications are known as SEPIC (single-ended primary inductance converter) and Cuk. The SEPIC converter is characterized by the use of two inductors, preferably a dual-winding inductor which has a small footprint, low leakage inductance, and the ability to increases the coupling of the windings for improved circuit efficiency. In a SEPIC architecture, the boost section provides power factor correction (PFC) and the buck section produces a voltage to be the same as, lower, or higher than the input voltage, while output polarity of both sections remains the same. The Cuk topology combines the continuous output current of a buck and the continuous input current of a boost, which gives the Cuk the best EMI performance and allows the capacitance to be reduced as needed. The buck-boost converter is a non-isolated driver circuit. Like boost converters, buck-boost converters require overvoltage protection to prevent damages from excessively high voltage in case of an open-load condition.

A flyback switching circuit is a discontinuous conduction mode converter which provides AC mains isolation, energy storage, and voltage scaling. It is very much like a buck-boost converter, but with the inductor split to form a transformer. The flyback transformer with at least two windings not only provides complete isolation between its input and output circuits, but also allows for more than one output voltage in different polarities. The primary winding is connected to the input power supply, the secondary winding is connected to the load. Magnetic energy is stored in the transformer while switch is on and at the same time the diode is reverse-biased (i.e., blocked). When the switch is off, the diode is forward-biased and magnetic energy is released by current flowing out of the secondary winding. Some flyback circuits use a third winding, called a bootstrap or auxiliary winding, to power the control IC. More accurate control of the average voltage across the capacitor, which is used to maintain current flow in the LED load when the converter is on the first step, requires isolated feedback, usually via an optocoupler. Flyback swiching circuits can be designed for a very wide range of supply and output voltages, with isolation from dangerously high voltages. However, these circuits are less efficient (75 – 85%, higher efficiency is possible by using expensive parts).

Linear Power Supply

A linear power supply High Bay Light uses a control element (such as a resistive load) which operates in its linear region to regulate the output. In this type of LED driving circuits, the voltage flowing through a current-sensing resistor is compared to the voltage reference in a feedback loop to produce the control signal. A controller which is operated in a linear region of the closed loop feedback system adjusts the output voltage until the current flowing through the sensing resistor matches the feedback voltage. The current delivered to an LED string is thus maintained as long as the forward voltage does not exceed the dropout-limited output voltage. Linear drivers provides only step-down conversion, which means the load voltage must be kept lower than the supply voltage. If the load voltage is higher than the supply voltage or the supply voltage has a wide variation, a switching regulator is needed.

AC mains-powered applications, which has demanding requirement for voltage regulation, typically employ switched linear regulators to drive LED lamps with a long string of LEDs wired in series. Switched linear regulators are combinations of multiple linear regulators which are either integrated or cascaded in a modular form. Typically designed in surface-mount IC packages, these linear regulators are used to intelligently adjust the number of load connected LEDs in a string during a power line cycle so that the load voltage matches the instantaneous AC mains voltage.

Linear LED drivers provide an extremely simplified solution which eliminates the need for bulky and costly coils, capacitors, and the reactive (e.g., inductive and/or capacitive) input EMI/EMC filter elements. A significantly low parts count and the use of solid state components allow the switched linear regulator to be downsized to a compact IC chip. This makes linear drivers a competitive candidate for LED lamps of which cost and physical size are important design considerations. With the ability to generate a substantially resistive dimmer load which is similar to an incandescent lamp, linear LED drivers have generic compatibility with legacy phase-cut (TRIAC) dimmers that were designed for dimming resistive loads.

Characterized by its cost competitiveness, EMI/EMC immunity, small footprint and design simplicity, the linear driving topology is gaining a rising interest in the industry. However, linear drivers are struggling with their inherent disadvantages that hold them back from entering mainstream applications in quite a few product categories.

1. A linear LED driver can be of low efficiency, when the supply voltage runs substantially higher than the load voltage.

2. The excess power is released as heat energy, resulting increased thermal stress on the driver circuit and very likely on the LEDs as well if heat is not efficiently dissipated.

3. The limitation of having to keep the load voltage lower than the supply voltage within a certain range leads to a further disadvantage of only allowing a restricted supply voltage range.

4. Linear drivers available on the market are dominantly low cost circuits which give no special consideration on flicker elimination.

5. The non-isolated topology provides no electrical isolation from the AC mains supply.

Switched Vs. Linear

The design of an LED driver involves many compromises. The selection between SMPS and linear drivers has to take cost, efficiency, control, lifespan, dimming, size, power factor, flicker, input/output, AC mains isolation, and various other factors into consideration.

Switching power supplies are obviously more efficient than the linear ones because of their “0/1” (ON/OFF switching) modulation. They can be designed to deliver high power efficiency as well as flicker-free illumination while maintaining a high power factor and low total harmonic distortion (THD). While linear LED drivers have been envisioned to be a prospective LED driving solution, SMPS is, for the foreseeable future, still the preferred LED driving solution for applications where efficiency, lighting control, light quality, and electrical safety are of paramount concern. In particular, the digital controllability of SMPS drivers, which are equipped with smart sensor technology and wireless connectivity, promises to enable a variety of Internet of Things (IoT) applications. Digital modulation allows encoding the data in binary for high-speed optical wireless communication (LiFi), which vastly expands the application potential of SMPS drivers.

Nonetheless, the captivating features of SMPS drivers are achieved at the expense of their dependence on bulky, expensive and unreliable reactive components, such as transformers, inductors, and capacitors. High-speed switching operation causes much noise, thus leading to a relative high level of electromagnetic interference which has to be filtered and screened using additional circuits. These additional circuits can tremendously increase the physical sizes and double the overall cost of the LED driver.

The largest disadvantage of SMPS drivers, which is also the most attractive feature of linear drivers, is their reliability. An SMPS driving circuit uses a large number of components including filters, rectifiers, power factor corrector (PFC) circuits, etc. The complex design may degrade circuit reliability. Widespread use of aluminum electrolytic capacitors in the PFC as an energy-storage component introduces the biggest concern about the reliability of an SMPS driver. Electrolytic capacitors are known for their high-capacitance value and high-voltage rating. Nevertheless, the electrolyte in the capacitor will evaporate over time. The evaporation rate linearly correlates to temperature. High temperature will accelerate electrolyte evaporation, which causes a decrease in capacitance and an increase in ESR (equivalent series resistance). Increased ESR translates to high output voltage ripple and noise. And the capacitor eventually fails when electrolyte dries out, leading to the premature failure of the entire lighting system. High-speed switching operation can produce electromagnetic interference (EMI) which adversely affects the surrounding circuit elements. This poses an additional design challenge to overcome. The uses of a noise filter leads to an increase in volume and weight as well as manufacturing cost.

On the other side, linear drivers do hold a great potential owing to the previously mentioned advantages. They typically outlive SMPS drivers, simplifies lamp design, and delivers cost, and reduce the BOM significantly. However it’s challenging to design a linear driver with conversion efficiency and flicker mitigation comparable to SMPS circuits. This technology is currently being abusively used. The majority of the lighting manufacturers take it as a low cost driving solution only. While it’s acceptable to employ linear drivers in LED luminaires for applications where high quality light and AC mains isolation aren’t a top priority (e.g. outdoor lighting), some manufacturers are attempting to incorporate this low cost LED driving solution in the visually demanding, safety sensitive indoor lighting applications without improving the driver’s output quality (flicker control) and enhancing the electrical safety and heat dissipation of the lighting system.

Driver-on-Board (DOB)

DOB is a typical implementation of the linear driving topology. Also called an AC LED light engine, the DOB LED module accommodates the LEDs and all the driver electronics on a metal-core printed circuited board (MCPCB). DOB technology takes advantage of the MCPCB-mountability of the high voltage driver ICs (switched linear regulators). Unlike the SMPS driver circuitry which has to be mounted on a routed FR4 PCB, these surface-mount driver ICs can be soldered to the LED-mounted MCPCB without circuit routing. This eliminates entirely the need for a dedicated driver assembly and thus allows for a compact form factor. Another benefit of DOB design is that the excellent thermal conductivity of the MCPCB can facilitate rapid dissipation of heat generated due to the inefficient conversion of a linear driver.

Power Utilization

The power processing that goes on inside an SMPS usually causes its power drain to be uneven due to current pulse modulation. The way that switching regulators draw pulses of current from the utility power grid can produce kinks and distortions in the power line current waveform as well as trip fuses and circuit breakers at power levels lower than power line capability. The presence of these harmonic distortion and nonlinear loads can lead to various problems such as overheating of neutral conductors and distribution transformers, failure or malfunction of the power generation and distribution equipment, and interference with communication circuits, etc. From a utility point of view, these damaging disturbances from downdream electrical equipment must be prohibited. Therefore utility companies have regulatory requirements on the power factor (PF) and total harmonic distortion (THD) of electrical equipment, including line-powered LED luminaires.

Power factor is the ratio of power utilized to power delivered and is expressed as a number between 0 and 1. A purely resistive loads has a power factor of 1 because draws current exactly in phase with the line voltage. Nevertheless, the reactive elements such as capacitors and inductors of an LED driver draw an additional reactive current which is difficult to measure and therefore impossible for the utility companies to collect revenue from. Most importantly, this reactive power will cause the delivered power (apparent power) larger than the power actually required by the LED luminaire. This can cause the utility’s infrastructure to operate above capacity and can incur damage potential if no measure is taken to protect the infrastructure from being overloaded by the additional reactive power. The closer the PF is to 1, the more closely matched the current and voltage waveforms are. As the PF decreases, more power is wasted in the form of reactive power. In the commercial and industrial sectors, utilities will often surcharge end-users who operate with low-PF electrical equipment to compensate increased generation and transmission cost.

The power factor of an LED lamp or luminaire has become a specification requirement in many markets. The EU Directive requires an LED product with a power consumption of more than 25 W to have a PF higher than 0.9. In the U.S., both Design Light Consortium (DLC) and Energy Star have PF regulations similar to Europe. The State of California has clear regulation for PF value which has to be greater than 0.9 for all power levels of residential and commercial LED lighting. In order to meet regulatory PF values, line-powered LED drivers designed for AC mains applications must employ some form of power factor correction to maintain a high power factor over a wide input voltage range. A power factor correction (PFC) circuit is typically used to minimize the reactive power and maximize the available power from the source and distribution cabling. PFC circuits, which include active and passive PFCs, shape and time-align the input current into a sinusoidal waveform that is in phase with the line voltage.

Total harmonic distortion (THD) is often brought up in the same breath with the issue of a low PF. THD is a measurement of distortion in the current waveform caused by non-linear electrical loads such as rectifier loads. Distorted current waveforms can reduce the PF and create harmonic distortion as well. Harmonic distortion also occurs when the load draws a current that does not resemble a true sinusoid. THD is represented as a percentage. The lower the value, the better. High THD can cause issues within the power distribution equipment. So it’s important that LED drivers meet regulatory THD values (typically less than 20%) over the entire input voltage range. THD is suppressed by the power factor correction circuitry which must effectively shape the input current to ensure minimal energy at higher frequencies is generated.

Both PF and THD can be affected by dimming. Therefore, it is necessary to have PF and THD measured at full and dimmed outputs.

Dimming Control

The transition from traditional lighting technology to solid state lighting is driven by the need for greater efficiency, control and interaction. At the heart of lighting control is dimming technology which is an integral functionality of light management systems. One of the advantages to LEDs is the ability to respond instantaneously to changes in power input which is regulated by the LED driver. The dimming performance of an LED driver is increasingly important as lighting becomes more connected and adaptive to user needs and preferences. The most commonly used dimmer-to-driver controls include triac (triode for alternating current), 0-10V, and DALI (Digital Addressable Lighting Interface). Pulse width modulation (PWM) and constant current reduction (CCR) are the most common methods used to dim LED loads from the driver.

Phase control dimmers operates by chopping-out portions of the AC voltage cycle to control the light output. Phase control circuits include 2-wire forward phase (leading edge) control, 2-wire reverse phase (trailing edge) control and 3-wire forward phase (leading edge) control. Phase control dimming is often used in retrofit applications where pulling new or additional branch circuit wiring or back-end control wiring can be complicated and expensive. However, the LED driver must be designed to recognize and respond to the voltage signals from the dimming circuit. Failing to interpret a variable phase angle output from the phase control dimming is likely to produce flicker and reduce the dimming range.

0-10V is a 4-wire (Hot and Neutral, plus 2 low-voltage control wires) dimming method and is sometimes referred to as 1-10V dimming as most typical 0-10V dimmable drivers can only be dimmed from 100% (10V) down to 10% (1V), and 0V turns the lamp off. In this method, the driver is the current source for the DC signal and is thus is reliable with dimming occurring in the driver. The control circuit sends low voltage control signals to adjust an input to the driver by varying the voltage between 1V and 10V DC. Since the control signal is a small analog voltage, long wire runs can cause a voltage drop and produce a drop in the signal level. 0-10V is a universal control protocol in the lighting industry and finds its popularity in commercial lighting applications. However, the 0-10V dimming standards for architectural applications in the US do not define the value of the minimum light output and address the shape of the dimming curve. This is likely to cause incompatibility between controls and devices from different manufacturers.

DALI, with the ability to provide addressing of individual fixtures and status feedback from the loads, provides great flexibility in lighting control through a 4-wire (Hot and Neutral, plus 2 low-voltage data link topology-free wires) system. DALI is typically used where the control strategy requires the light fixture to respond to more than one controller (e.g., a manual control switch and an occupancy sensor). DALI is a bidirectional protocol and a DALI lighting system can operate up to 64 control points (drivers, dimmers, relays) without using a central control unit. The DALI protocol uses logarithmic dimming which provides 256 steps of brightness with a standardized dimming curve in the range of 0.1% to 100%.

PWM controls the brightness of an LED by varying the duty cycle of a constant current at a pulse rate high enough to be imperceptible to the human eye. The ratio of on time to off time determines the perceived light intensity. Pulse width modulation keeps the forward current constant, which eliminates the concern of color shift and is thus advantageous for applications that requires a consistent CCT over a wide dimming range. PWM dimming is commonly used for both static and dynamic intensity adjustment with white light sources as well as RGB LEDs. In RGB color mixing applications, PWM dimming allows the brightness of the individual sources to be precisely adjusted to deliver the desired color. However, high speed switching can generate electromagnetic interference. PWM drivers cannot be mounted remotely from the light source because the increased transmission distance from the driver to the light source may interfere with the high frequency, time sensitive duty cycles.

CCR or analog dimming adjusts light intensity by changing the DC drive current flowing through an LED. Because the current is changed linearly, CCR is essentially flicker-free. Constant current dimming can also operate over a wider range of light output than typical phase-cut dimming. The disadvantages of CCR include poor performance at low currents (below 10%), color shift of LEDs when dimming the LEDs to 20% of the rated output, and asynchronous response at higher currents due to the droop effect. CCR dimming circuitry can be controlled through a variety of protocols, such as 0-10V, DALI, and ZigBee. CCR and PWM can be combined to provide hybrid dimming so the advantages of both techniques can be harvested.

Flicker Mitigation

Flicker is amplitude modulation of the light output that can be induced by voltage fluctuations in AC mains, residual ripples in the output current provided to the LED load, or incompatible interaction between the dimming circuits and LED power supplies. Flicker can cause other temporal light artifacts (TLAs) which include stroboscopic effect (the misperception of motion) and phantom array (pattern appears when eyes move). TLAs come in both visible and invisible forms. Flicker that occurs at frequencies of 80 Hz and lower is directly visible to the eye, and invisible flicker is the temporal variations occurring at frequencies of 100 Hz or higher. The stroboscopic effect and phantom array will typically occur within a frequency range of between 80 Hz and 2 kHz, their visibility varies in populations. While invisible TLAs is not perceptible to the human eye they can still have a number of negative consequences.

Flicker and other TLAs are undesired temporal patterns of light output that can cause eye strain, blurred vision, visual discomfort, reduced visual performance and, in some cases, even migraines and photosensitive epileptic seizures. Therefore they’re one of the key considerations in light quality assessment. The intended use of artificial lighting plays a role. Different lighting scenarios may tolerate different level of temporal light artifacts. TLAs may be less of a concern for roadway, parking lot, and outdoor architectural lighting, or other applications where the duration of exposure to artificial light is limited. Artificial light with a high percentage of flicker should not use for both ambient lighting and task lighting in homes, offices, classrooms, hotels, laboratories and industrial spaces. Flicker-free lighting is not only critical for visual tasks that demand precise positioning of the eyes and environments where susceptible populations spend considerable time, it’s high desired for HDTV broadcasting, digital photography and slow-motion recording in studios, stadiums and gymnasiums. Video cameras can pick up TLAs the way like the human eye detects these effects.

The key to mitigating flicker lies in the LED driver which is designed to rectify commercial AC power into DC power and filter out any undesirable current ripple. Sufficiently large ripples, which typically occurs at twice the frequency of the AC mains voltage, in the DC current provided to the LED load result in flicker and other visual anomalies at a frequency of 100/120 Hz. Thus the allowed level of ripple current in the LEDs, such as ±15% ripple (a total of 30%), must be defined in LED drivers for various applications where flicker matters. The ripples may be smoothed out by using a filter capacitor. One of the major challenges in driver design is to filter out ripples and harmonics without using bulky, short-lived high voltage electrolytic capacitor on primary side. AC LED engines are inherently susceptible to the flicker phenomenon because the LEDs in fact run from what is essentially the intermediary DC voltage that would be in an SMPS-based LED lighting system. Rapid alteration in polarity gives rise to a flicker in the intensity at a frequency twice the AC sinusoidal frequency. Despite the simplicity in circuit design, additional circuitry is required to effectively reduce the temporal variation in the power supply.

Standards for limiting flicker for different applications are yet to be established. Two metrics were established by IES to quantify flicker. Percent flicker measures the relative change in the light modulation (the depth of modulation). Flicker index is a metric that characterizes the intensity variation over the entire periodic waveform (or duty cycle, for square waveforms). Percent flicker is better known to general consumers. In general, 10 percent flicker or less at 120 Hz or 8 percent flicker or less at 100 Hz is tolerable for most people except for the at-risk populations, 4 percent flicker or less at 120 Hz or 3 percent flicker or less at 100 Hz is considered safe for all populations and highly desired in visually intensive applications. Unfortunately, a large number of LED lamps and luminaires currently supplied on the market have a high flicker percentage. AC LED lights, in particular, come with flicker typically higher than 30 percent at 120 Hz.

Circuit Protection

Depending on the driver topology, circuit design and application environments, LED drivers can run up against load anomalies and abnormal operating conditions such as overcurrent, overvoltage, undervoltage, short circuit, open circuit, improper polarity, loss of neutral, and overheating, etc. Therefore, LED drivers should incorporate protection mechanisms in order to address these challenges.

The output voltage of some constant current drivers, especially switching boost converters, can rise too much above the nominal drive voltage due to load disconnection or excessive load resistance. Open circuit protection or output overvoltage protection (OOVP) provides a shutdown mechanism which uses a Zener diode to give feedback and conduct the output current to ground when the output voltage exceeds a certain limit. A more preferred method of open circuit protection is to utilize an active voltage feedback scheme to shut down the supply when the overvoltage trip point is reached.

Input overvoltage protection (IOVP) is designed to relieve the driving circuit from overvoltage stress as a consequence of switching operations/load change on the power grid, lightning strikes nearby, lightning strikes directly on the lighting system, or electrostatic discharge. In AC line applications, slight but sustained overvoltage can cause high currents (energy impulses) in the LED driver and LEDs, which may lead to failure of the LED driver and control interfaces, and the premature aging of the LEDs. A metal oxide varistor (MOV) or transient voltage suppressor (TVS) can be placed across the input to absorb energy by clamping the voltage. A plastic film capacitor, which is typically connected across the AC line to reduce EMI emissions, also helps absorb some of the energy in surge pulses.

LED drivers usually come with a limited level of surge protection from the built-in overvoltage protection circuits. In some applications such as street lighting, additional surge protection devices capable of surviving multiple surges or strikes should be added to the driver to protect downstream components from high surges. The SPD should be rated reduce or discharge high pulse energy of a minimum 10 kV and 10 kA, as per ANSI C136.2.

A short circuit at the load of a linear power supply can lead to overheating but makes no difference to the current supplied to each LED because the current limiting circuits provide automatic short circuit protection. However, in a switching buck regulator, a short circuit will lead to a failure of an LED or the entire module depending on the circuit design. The failure of a single LED usually has minimal impact on the total light output. The change in voltage can be balanced out using a self-adjusting current sharing circuit which still distributes the current equally. On the other side, a short circuit at the load of an LED string can significant affect the total light output. The failure detection mechanism of short circuit protection can be implemented by monitoring the duty cycle. A short circuit typically results in a very short duty cycle.

Overtemperature protection for LED systems include Module Temperature Protection (MTP) and Driver Temperature Limit (DTL). DTC uses an NTC (negative temperature coefficient) resistor to cut back output current when the maximum driver case point temperature in the application exceeds a predefined limit. MTC monitors the temperature of the LED module and is interfaced with the driver which automatically reduce the current to the LEDs when a threshold temperature is detected by the MTC. DTL can also be used as alternative to MTP if the driver TC point and LED module temperature can be correlated.

EMI and EMC

Electromagnetic interference (EMI), also referred to as radio frequency interference (RFI), affects other electrical circuit as a consequence of either electromagnetic conduction or electromagnetic radiation emitted by electronics such as those in LED drivers, CB radios and cell phones. Any LED driver connected to AC mains supply has to meet the radiated emissions standards such as defined in IEC 61000-6-3. In an LED driving circuit, MOSFET switching is usually the main source of EMI. A PCB layout with paths for the switching currents kept short and compact is also important to limit EMI. In some applications an input filter is required to reduce high frequency harmonics and the design of this circuit is critical to maintain a low EMI. The ground plane on the circuit board must remain continuous so as to avoid creating a current loop that causes high levels of EMI to be emitted. A metal screen may be mounted over the switching area to provide an enclosure that stops EMI radiation.

Electromagnetic compatibility (EMC) is the ability of a device or system to operate in its electromagnetic environment without yielding EMI that disturbs neighboring equipment or being disturbed by the EMI radiated by neighboring equipment. The EMC performance of the LED driver is often automatically assured by a good EMI design. However, electrostatic discharge (ESD) and surge immunity which are not taken into account in EMI practices also affects the EMC performance.

Safety Considerations

Safety should always remain the number one priority when evaluating a driver and the lighting system it operates. A line-powered LED driver with dielectric isolation, e.g., 1500 V RMS (50 or 60 Hz), from input to output is highly desired. The input/output circuit isolation can only be accomplished with a transformer which has primary and secondary windings with good galvanic isolation. The output voltage must be kept below the 60 VDC safety extra low voltage (SELV) limit as per IEC 61140. However, there’s an increasing number of LED lighting products which implement a non-isolated topology for the purpose of cutting cost. The risk of electric shock is a serious concern in LED products driven by low cost linear regulators. These circuits offer no isolation between the input and output circuits, and the electrical insulation of the lighting systems may have not been adequately tested.

The issues of creepage and clearance distances must be considered for AC powered products. The creepage distance between primary and secondary circuits must meet the spacing requirements otherwise electrocution or fire can occur. Clearance, which is defined as the shortest distance between two conductive parts, must be factored in to prevent arcing between electrodes caused by the ionization of air. As the sizes of electronic circuits continue to shrink, a good PCB design is essential for a driver circuit to not only reduce EMI emissions, but also reduces creepage and clearance problems.

All electrically-conductive and touchable parts of a line-powered Protection Class I LED driver must be connected to earth. LED drivers designed to operate LED lighting systems for residential and commercial applications are typically listed as Class II. There’s no enclosure grounding for class II LED drivers, but all the conductor inside a class II drivers must be dual or reinforced insulated to ensure good insulation between the mains power circuit and the output side or the metal casing of the driver.

Thermal Considerations

An LED driver is configured to convert the AC line voltage into DC output as efficiently as possible, and any energy lost in the conversion process will be converted into heat. This means an LED driver with 90% efficiency requires an input power of 100W/0.9 = 111 W to drive a 100W load. Among the input power 11W is the power loss that escapes in the form of heat. This places a high thermal stress on the LED driver circuit. When the driver is co-located within the luminaire housing, the thermal load from the LEDs will end up in additional increase in the driver temperature. In addition to utilizing components that are rated for high temperatures, the driver has to be designed to pull heat away from thermally-sensitive components. Excess heat buildup will cause reliability issues with components, including electrolytic capacitors which will dry out when exposed to heat. Therefore the temperature at which an LED driver is running is fundamentally important in defining its lifetime. To facilitate heat dissipation, LED drivers for high wattage LED luminaires use aluminum enclosures which can come with high density fins and thermally conductive potting.

Ingress Protection

LED drivers for roadway, street, exterior and landscape lighting applications must be sealed to protect against ingress of dust, moisture, water and other objects that may pass through into the products. A high degree of ingress protection (IP) for LED drivers is critical for indoor applications such as carwashes, cleanrooms, bottling and canning plants, food processing facilities, pharmaceutical plants or any industrial application requiring exposure to daily high-pressure wash downs. Self-contained LED drivers for wet locations are usually potted in silicone to enhance enclosure integrity while also facilitating electrical insulation and thermal management. These drivers typically come with IP65, IP66 or IP67 level ingress protection.

Location Impact

LED drivers can be remote mounted or co-located within lamp or luminaire housings. In co-located, non-DOB systems, the driver must be thermally isolated from LEDs which generate a huge amount of heat. Driver maintenance should be taken into consideration when designing a luminaire housing. In remote-mounted systems, PWM drivers can experience performance losses over a long distance. As such, CCR is the preferred dimming technique for remote-mounted systems.

LED Driver (LED Power Supply) for Street Light: Isolated and Non-Isolated Linear Driver最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

How Many Types Of Solar Led Street Lights?

According to the different battery placement positions in the solar street light system, it can be roughly divided into three types of solar street lights.

• Coventional solar street lights
• Integrated solar street lights
• All in Two solar street lights

1. The traditional split solar street light system （led street light with separate solar panel and separate battery） is an independent distributed power supply system. The solar panels, batteries, light source, and other components in the system are all independent of each other. Generally, the storage battery is buried in the ground or placed on the street lamp pole.

2. The second type is integrated solar street lights, also called All-in-one solar street lights. It integrates all the parts and components required by the system into one lamp body, which is very convenient to install.

3. The third type is a derivative version of integrated street lights, called All in two solar street lights. This kind of street light mainly integrates the lithium battery and the solar control into the LED street lamp body, but a separate solar panel on the outside.

How many types of batteries for solar street lighting system?

Corresponding to the above different types of solar led street light systems, most led solar street lamp manufacturers use the following 4 types of batteries.

1. Lead-Acid Battery

Lead-acid battery (VRLA) is a kind of battery whose electrodes are mainly made of lead and its oxides, and the electrolyte is a sulfuric acid solution. It is also called AGM Battery.

Advantages: The voltage is relatively stable. Under the premise of the same capacity, its price is the cheapest among the four types of batteries;

Disadvantages: The specific energy is relatively low, so the volume is much larger than ordinary batteries. The service life of lead-acid batteries is relatively short, generally, 300-500 deep cycles. And maintenance is more frequent. But because of the price advantage, it is still widely used in the solar street light industry.
The nominal voltage of a single-cell lead-acid battery is 2.0V, which can be discharged to 1.5V and can be charged to 2.4V; in applications, 6 single-cell lead-acid batteries are often connected in series to form a lead-acid battery group with a nominal 12V or form 24V, 36V, 48V and so on. The common AGM battery 12V 24V series is 35AH~250AH. It is mainly suitable for traditional split solar street light systems.
 

2. GEL Battery

GEL batteries belong to a development classification of lead-acid batteries. The method is to add a gelling agent to sulfuric acid to make the sulfuric acid electro-liquid into a colloidal state. It is equivalent to an upgraded version of lead-acid batteries. It is maintenance-free and solves the criticism of frequent maintenance of lead-acid batteries.

Advantages: The storage capacity, discharge capacity, and life are improved. The number of cycles is about twice as long as that of AGM batteries, which can reach 500-800 deep cycles. At the same time, the GEL battery can be used in the temperature range of -40℃-65℃, and its resistance to high and low temperatures is much better than that of AGM batteries. It can be used safely under various high and low-temperature conditions. Good seismic performance, suitable for long-distance transportation.

Disadvantages: The price is much higher than that of AGM batteries, sometimes even surpassing the price of lithium-ion batteries.

The colloidal electrolyte replaces the sulfuric acid electrolyte inside. The nominal voltage of a single-cell lead-acid battery is 2.0V, which can discharge When it reaches 1.5V, it can be charged to 2.4V; in the application of the solar street light system, multiple single-cell lead-acid batteries are often connected in series to form a nominal 12V or 24V 36V 48V lead-acid battery for use. Common GEL batteries for solar street lights include 12V 24V series 35AH~300AH. It is also mainly used for traditional split solar street light systems.

3. Ternary Lithium Battery

Ternary polymer lithium battery refers to a lithium battery using lithium nickel cobalt manganate (Li (NiCoMn) O2) or lithium nickel cobalt aluminate as the positive electrode material. The nominal voltage of a single ternary lithium battery is 3.7V. In solar-led street lamp systems, 3.7V battery systems are usually used.

Advantages: high specific energy, fast charging. Its deep cycle times are about 800-1000 times, life is similar to gel battery, working temperature is -30 to 55 Celsius, low-temperature resistance performance is very good, very suitable for use in low-temperature areas. Its size is very small, mainly used for Integrated solar street lights or All-in Two solar street lights.

Disadvantages: Poor high-temperature resistance. Its internal structure is not stable. If it is a ternary lithium-ion battery produced by an unqualified manufacturer, it may explode during the overcharging process, or in a higher temperature environment.

The price of this solution is the cheapest among lithium batteries, and of course, the capacity is also the lowest, but it is not suitable for solar street lamp systems with high power such as 100W and above. For some high-quality solar street lights, if ternary lithium batteries are used, professional manufacturers will use 11.1V systems (3pcs 3.7V battery do series), whose capacity is at least 3 times that of 3.7V, and of course, the price will be higher.

4. Lithium Iron Phosphate Battery

Lithium iron phosphate battery is a kind of lithium-ion battery that uses lithium iron phosphate (LiFePO4) as the positive electrode material and carbon as the negative electrode material. The rated voltage of the single unit is 3.2V, and the charge cut-off voltage is 3.6V~3.65V. Solar-street lights with lithium iron phosphate batteries on the market are generally divided into 3.2V systems, 6.4V systems, and 12.8V systems. For small power and strict price requirements, 3.2V battery packs are generally used. The 12.8V battery packs are mainly used for high-quality street lights, it is long-lasting solar batteries.

Advantages: low self-discharge rate, high energy density without memory effect, small size, fast charging, and long life. Its deep cycle charging times are generally 1500-2000 times. A set of lithium iron phosphate batteries is generally in normal use. It can be used for 8-10 years. High-temperature resistance can be used in an environment of -40℃-70℃, and the temperature range of use is relatively wide.

It has good stability and relatively stable electrochemical performance, which determines that it has a stable charging and discharging platform. Therefore, the structure of the battery will not change during the charging and discharging process, and it will not burn and explode. It is still very safe under special conditions such as extrusion and acupuncture.

Disadvantages: Under the premise of the same capacity, its price is the highest among the above 4 batteries.

Solar street light battery price

The cost of solar street light batteries will be seriously affected by different raw materials, such as the grade of the battery cells and the quality of the protective plate inside the lithium battery. When choosing different batteries, consumers need to pay attention to these points. The following is the average price for your reference.

Conclusion

Which battery solar street light to choose depends on the specific conditions of the customer or the project. Combining the different advantages and disadvantages of the above various batteries. The solar street light batteries buying guide as follows:
 

Integrated solar street lights, or All-in Two solar street lamps.

• If your place is in a low-temperature environment, then the Ternary polymer lithium battery is best for solar street light.
• If the ambient temperature you use is relatively high, such as in Africa, the Middle East, Southeast Asia, and other regions, then solar street lights with LiFePO4 batteries are the best.
• If you request low price solar street lights or are only used for residential places, then just choose the solar street lighting with 3.7V or 3.2 Battery backs.
• If you want solar street lights to meet the long-term lighting needs, then the 12.8V 11.1V battery pack is the basic requirement. If you can not decide which solution is the best for you or your projects, we will provide the best solutions for you.

Conventional solar street light.

• If you focus on the price, then solar street lights with AGM Batteries are best for you.
• If you request high quality or use it in a low-temperature environment, then the GEL Battery solution will be best for you.

How do you calculate battery and solar panel size of solar street light?

Solar street lights have become more and more popular in the market this year, especially in regions or countries with sufficient solar energy, where the market share is getting higher and higher. Correspondingly, the market is flooded with LED solar street lamps of uneven quality. Some low-quality solar street lighting has seriously affected the customer’s experience. The most common problem is that some lamps have insufficient lighting time. Solar street lights can only turn on for 2-3 hours a day. To solve the problem of insufficient lighting time, it is necessary to select batteries and solar panels of appropriate capacity. So how do we calculate the appropriate battery and solar energy capacity?

• First calculate the current required by the entire solar street light system

For example: 12V battery system; 50W LED street light.
Current = 50W÷12V = 4.17 A

• Second, the calculation of the required capacity of the battery

For example, LED street lamp lighting time is 11 hours per night, the actual 100% load lighting is 7.5 hours (h);
(At 7:00-11:00 in the evening, turn on 100% power, at 11:00 at night-6:00 in the next day, the brightness power is 50%=25W)
Need to meet the lighting needs of continuous rainy days for 3 days. (3 days plus the lighting the night before the rainy day, total 4 days)
Battery = 4.17A×7.5h×(3 + 1) days
= 4.17A×30h = 125AH
In addition, in order to prevent the battery from overcharging and over-discharging, the battery is generally charged to about 90%; the remaining discharge is about 5%-20%. So 125AH is only about 70%-85% of the real standard in the application. In addition, the actual loss should be measured according to the different loads. The actual working current is affected by a constant current source, ballast, line loss, etc. It may increase by 15%-25% on the basis of 4.17A.

• Calculation of required power for solar panels

According to the above example, the cumulative lighting time of 50W LED solar street lights needs to be 9 hours (h) per night; at the same time, we set a daily effective solar light duration of 6 hours (the effective light duration of each area is different), Then the required solar panel capacity is:

Relax at least 20% of the extra amount required for solar panels.
WP÷17.4V = (4.17A×7.5h×120%)÷6h
WP÷17.4V = 6.26
WP=109(W)
In addition, in the solar street lamp assembly, the line loss, the loss of the controller, and the existence of the ballast or constant current source are different. In practical applications, it may be about 15%-25%. Therefore, 130W is only a theoretical value, and a 120W solar panel is generally a safe solution.

Another Example

•60W led power at 24V
•Dimming 1 hour 50% + 5 hours 100% + 6 hours 30%
•3 days backup (that is 1 + 2 days)
LiFePO4 batteries

•The led lamp has a consumption of 60W/24V = 2.5 Ampere
•The dimming mode has the same consumption as 7,3 hours at 100%
•The total daily consumption is 2.5 Ampere * 7,3 hours = 18,25 Ampere-hours (Ah)
•If we need 3 days backup, the total consumption is 18,25 Ah * 3 days = 54,75 Ah
•LiFePO4 batteries has a DOD of 80%, so 54,75 Ah / 80% = 68,44 Ah at 24V .
•Batteries are normally at 12V so we need 2 batteries at 68,44 Ah.
In case battery is GEL;
•The DOD is 50%
•So we need 54,75 Ah / 50% = 109,5 Ah at 24 V.
•Since batteries are normally at 12V we need 2 batteries at 109,5 Ah

Conclusion

If you want solar-led street lights to meet the lighting time just like ordinary LED street lights, the general approach is to increase the capacity of solar panels and batteries. However, in the actual market environment, many manufacturers in order to attract customers with low prices Often cut corners, especially to reduce the capacity of the battery (because the cost of energy storage batteries in the solar street light system is the highest). If you want to buy a solar street light that meets the standards, please pay attention to the capacity of the solar panels and batteries.

How many types of batteries, calculate battery and solar panel size for solar street lighting system?最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。

How Long Will It Take to Finish an Installation?

In my experience with this brand, it only took 10 minutes to read through and understand the process. Then another 10 minutes to install it for the first time. The next installations only took 5 to 7 minutes for each street light.

So for 10 street lights and, say, a pole distance of 35 meters each, it would only take maybe 2 hours to finish the installation process, if you’re a one-man army. Of course, installation time is lesser if there are two or more installers.

And you won’t need any engineering background, by the way. There’s no wiring and circuitry process in solar street light products as they are all pre-wired in the LED fixture. Not unless you want to wire things on your own, you can refer to “Make a Smart Solar Powered Street Lamp” blog.

At the end of the day, you’ll feel heroic if you were able to install a street light by yourself. So read on to know how you can do it yourself.

Unboxing let’s first find out what’s inside the box. Inside its packaging, you’ll find the following:

Unit main body or the solar light assembly
Bent pipe (for Angel Eye); connection pieces.
Anchor fixtures (A and B) – these are properly labeled
Some M8 screws depending on the model (M8x100, M8x50, M8x60, M8x15)
Tools such as Φ6mm Allen key; Φ4mm Allen key; Φ2mm Allen key; open spanner
User manual
Remote control (for Solar Street Light model )
How to Install an A Series All-in-One Solar Street Light?
The A series is a swivel model all-in-one street light. It has an ultra slim figure and a modular design perfect for solar landscape lighting and courtyard lighting. carries this design with an available range from 15W to 80W.

Installation time: 5 minutes

5 Simple Steps:

1. Simply connect one end of the bent pipe to the main body unit and another end with the ‘Anchor ear B’ using M8x50 screw and M8x50 screw respectively.

2. Next is to secure the anchor ear B to its base with 4pcs M8x100 screws as shown in the diagram.

3. Secure the Anchor ear B to the Anchor ear A using 4pcs of M8x100 screws.

4. Place the lamp head onto the pole and secure with screws. Make sure that the LED source is vertically aligned with pole or set it at the desired direction.

5. At the bottom of the lamp is a switch for the microwave sensor. Press it once the installation is finished. The LED lamp will then light after 1 min delay and will turn off automatically when not needed.

Tips When Installing All-in-One Solar Street Lights

Before you install your first All-in-One Solar Street Light, make sure to follow these tips so you won’t have a problem with its operation.

1. Make sure that the solar panel direction faces the sun at 2:00 pm

As the solar panel is a fixed component, make sure that when you install the solar street light, the solar panel direction faces the direction of the sun at its highest peak. This is at around 12:00 nn to 2:00 pm.

During these hours, the sun’s intensity is very high and your solar panel can receive as much energy as it can. To make your solar street light work more efficiently, be sure to set the direction of the panel in such a way that that it faces the sun at 2pm.

2. Keep the Solar Street Light Away From the Shadow of Trees and Buildings

This is to maximize the efficiency of your solar panel and so that the battery can be fully charged.

3. Keep a Short Distance Between the Pole and the Lamp

Again, this is to ensure that the panel does not get any shadow from any object including the pole.

①“All in One solar street light” could not work without sunshine, please select the suitable model according to the local sunshine radiation and the annual total radiation.We suggest use the both AC and DC charging model in those places where lack of sunshine or have long-time rainy days.

②“All in One solar street light” adopts the long life Lithium battery for storing energy, charging temperature at day time is between:  0°C～+60°C,when temperature goes lower than 0°C ,the control system will stop automatically to protect the battery, and it will revive to charge the battery while temperature goes higher than 0°C. Discharging temperature at night is between: -20°C～+60°C, any ambient beyond will take damage to the battery. So please check these factors while selecting the street light.

③Battery of the “All in One solar street light” can be stored for 6 months long after fully charged. Therefore please examine and charge it periodically after long time transportation or storage to prevent damaging.

④When install the lights in Northern Hemisphere, please adjust the solar panel to the South as much as possible to collect maximum sunshine radiation, while install them in Southern Hemisphere, By the same token, keep solar panel to north. At the same time please keep it away from any shadow of houses, trees etc.

⑤Keep clear of the surface of the All in One solar street light with normal detergent to get maximum power generation, clear the dust or tree leaves or any grease.

⑥All in one solar street light have got the standard of IP65.The vents on the surface is designed for radiating.The materials are made of aluminum alloy which can survive in the environment of seaside and desert.

⑦The knob of the fuse is at the left rear end of the light, please insert the fuse while using.By the way,there is one piece of fuse more as backup.(If not fuse,then it is switch,just turn on the switch)

How It Should Work After Installation

After you install your all-in-one solar street light, it should be able to automatically switch on at dusk and switch off at dawn. It must also work automatically from dim to full brightness, depending on your specified time schedule profile setting.

For its original factory setting, the solar street light would automatically dim or decrease its intensity to 30% of its full brightness when it does not detect any passerby.

Conclusion

What an all-in-one solar street light is, is really an amazing innovation of the traditional solar street light. It’s easy to install, requiring less of your time and energy. I hope this blog has cleared some cloud of confusion on how to install all-in-one street lights.

If you want to buy affordable all-in-one solar street lights with high-quality parts, you might want to read “How Much Does an All-in-One Solar Street Light Cost” first before you find your supplier. This blog is on how All-in-One Solar Street lights can be really affordable when you pick the right manufacturer/supplier.

How to Install an All-in-One Solar Street Light最先出现在Solar LED Street Light, High Mast Light, LED Flood Light, High Bay Light。