Characteristics of LED street lights

LED street light refers to the street light made of LED light source. It has the unique advantages of high efficiency, safety, energy saving, environmental protection, long service life, fast response speed and high color rendering index. It is of great significance to urban lighting energy saving.

l Definition of road lighting

l Characteristics of LED street lights

l Design requirements for LED street lights

Definition of road lighting

Road lighting is an important part of urban lighting. Travditional street lights are often used. High pressure sodium lights emit light at 360 degrees, resulting in a huge waste of energy. At present, the global environment is deteriorating, and all countries are developing clean energy. With the rapid growth of the national economy, the contradiction between energy supply and demand is becoming increasingly prominent, and there is a serious shortage of power supply. Energy conservation is an urgent problem to be solved. Therefore, the development of new LED street lights with high efficiency, energy saving, long service life, high color rendering index and environmental protection is of great significance to urban lighting energy saving.

Characteristics of LED street lights

Road lighting is closely related to people's production and life. With the acceleration of China's urbanization, LED street lights have gradually come into people's vision with the advantages of directional lighting, low power consumption, good driving characteristics, fast response speed, high seismic capacity, long service life and green environmental protection, and become the new generation of energy-saving light source with the most advantages of replacing traditional light sources in the world. Therefore, LED street lights will become the best choice for energy-saving transformation of road lighting.

Design requirements for LED street lights

The biggest feature of LED for lighting is that it has the function of directional light emission, because almost all power LEDs are equipped with reflectors, and the efficiency of this reflector is significantly higher than that of lights. In addition, the efficiency of its own reflector has been included in the light effect detection of LED. For road lights using LED, the directional light emission characteristics of LED shall be used as much as possible, so that each LED in the road lights can directly shoot the light to each area of the illuminated road surface, and then use the auxiliary light distribution of the light reflector to achieve a very reasonable comprehensive light distribution of road lights. It should be said that road lights should really meet the illuminance and illuminance uniformity requirements of CJJ45-2006, cie31 and cie115 standards, and the function of three light distribution should be included in the lights in order to be better realized., The LED with reflector and reasonable beam output angle itself has good primary light distribution function. In the lights, the installation position and light emission direction of each LED can be designed according to the height of the road lights and the width of the road, so as to realize a good secondary light distribution function. The reflector in such lights is only used as an auxiliary means of tertiary light distribution to ensure better uniformity of road illumination.

As a new light source, LED has irreplaceable advantages in replacing incandescent lights and fluorescent lights, but there are still some problems in the use of high-power LED street lights. The promotion of radical and comprehensive replacement of LED street lights (especially main roads) may cause sequelae. In case of extreme weather, a large number of bad lights or serious light failure may affect road safety.