Road lighting is an important part of city lighting.The conventional street lamp - high pressure sodium lamp uses 360 degrees of lighting, the great light loss caused a huge waste of energy.With the continuous progress of science and technology, traditional street lamps are gradually replaced by new led street lights with high efficiency, energy saving, long life, high color rendering index and environmental protection.
Up to now,LED street lamp is the best choice for energy saving transformation of road lighting.So how to choose the best led street light for your lighting project?Keep reading!You will find answer from the outdoor led street light buying guide shared by EXC Streetlight.
What requirements should the best LED light meet?
1. The conversion rate of light should be required to reach up to17% (the solar energy of per square is 1000W,the actual utilization efficiency is 170W )
2. At present, the lens material of street lamp on the market is improved optical material, which requires that the transmittance is not less than 93% and the temperature resistance is -38~+90 degrees.
3. The light spot of lens that mainly be applied in LED street lamp is rectangular, the material is PMMA optical material, the transmittance is not less than 93%, temperature resistance is -38~+90 degrees.Anti-uv yellowing rate remained unchanged for 30000 hours.
4. The average illumination uniformity of road surface is 0.48, and the spot ratio is 1:2.
5. Requirement for humidity: no more than 95%.
The 7 Buying key points of LED street lamp
1. Luminous efficiency
LED lighting technology is becoming mature, and high-power LED light source can meet the luminous efficiency required by general street lamps.The Luminous efficiency of conventional high pressure sodium lamp is 100LM/W, commonly used high-power LED is 50-60LM/W, if use foreign LED chip can reach 80LM/W.The higher the luminous efficiency, the better the energy saving effect, which is also one of the most important indicators to choose best LED street light.
2. Luminous decay
In order to reduce costs, some manufacturers use hundreds of low-power LED with only 0.5W.However, the luminous decay of this low-power LED is very serious.When the luminous decay reaches 80%, its service life is only 1000 hours.Therefore, as street lights that need for long-term use, it is absolutely not allowed to use this kind of low-power LED.Choosing high-power LED (generally refers to more than 30W), its luminous decay problem is not so bad.
3. Self-weight problems
Due to high technical content, complex composition and other reasons of led street light, the weight of some high-power lamp will be far more than conventional high-pressure sodium lamp, so the requirements of corresponding support material are higher.However, some led street light manufacturers have tried to reduce the self-weight of LED lamp holder, down to about 10 kg from the original single lamp holder about 30 kg.There is a tendency for further decline of self-weight.
4. Heat dissipation
Because LED is a semiconductor component, its chip is affected by temperature and when reducing to 30% of the initial light flux, it will lose its lighting significance, that is,its life ending.Theoretically, the life of high-power LED street lamps is 30-50,000 hours, but its important premise is to have good heat dissipation.
5. Power supply
Power supply is also an important factor to judge the quality of LED street light.Only high efficiency and high precision power supply can ensure the high energy saving and long life of LED street lamps.PFC is also an important indicator in lighting projects where LED street lamps are widely used.The level of PFC in LED road light often becomes an important factor in whether the project can be approved or not.
6. Light distribution
LED street lights are lamp fixtures used for outdoor road lighting, which is different from spotlights.Spotlight requires light to be relatively concentrated, namely at ordinary times we say "flashlight effect".While led street lamps require large irradiation area and good uniformity.In a broad sense, the road is a rectangle. According to the characteristics of the road, it is required that the longitudinal irradiation area of the road (the direction of the road forward) is large, while the transverse irradiation area of the road is small.If the irradiation area of horizontal and vertical is the same, it is bound to cause light waste.For the light distribution of LED street lamps, it is how to achieve reasonable configuration of limited light of LED street lights.
7. Waterproof and dustproof
LED street light mostly work outdoors and are often exposed to wind and rain, so it is very important for LED road light to be waterproof and dustproof.Once the dust get into the LED street lamp, it will lead to reduced LED street light efficiency, brightness.If the water get into lamp, it will lead to the scrapping of LED street lamps.So the protection level of LED street lamps should be above IP65.
Best led street lights in China
Are you searching for the best led street light fixtures for your lighting projects?You have come to the right place!EXC Streetlight is an outdoor led street lights manufacturer located in Shenzhen,Guangdong province,China,integrating LED application products design,R&D,production,sale and service.EXC has rich experience in led street light manufacturing,committing itself to provide led lighting system solutions for customer worldwide.
Here,we listed newly launched outdoor led lighting lamp fixtures produced by EXC Street for your reference.If you are interested in it,click the picture for more details and quick quotation.
