LED street lights are different from traditional street lights. The LED light source adopts low-voltage DC power supply and combines GaN-based power blue LEDs with yellow synthetic white LEDs. It is highly efficient, safe, energy-saving, environmentally friendly, long life, fast response, and high color rendering index. Advantages, can be widely used on the road. The outer cover can be made, with high temperature resistance up to 135 degrees and low temperature resistance up to -45 degrees. The design requirements of LED street lights are as follows:
Lighting LEDs have the function of directional emission of light. Since almost all power LEDs are equipped with reflectors, the efficiency of such reflectors is much higher than that of lamps. In addition, the LED has taken into account its own reflection efficiency when detecting light efficiency. Road lights using LEDs should make full use of the characteristics of LED directional light emission, so that a single LED in the road light directly emits light to each area of the illuminated road surface, and then uses the auxiliary light distribution of the lamp reflector to realize the reasonable distribution of road lamps. Light.
It should be pointed out that the road lamp must truly achieve the illuminance and uniformity of the illuminance specified by CJJ45-2006, CIE31, CIE115 and other standards, and the three-light function in the lamp can be better realized. The LED with a reflective surface has a reasonable beam output angle, and it has a good primary light distribution function. Inside the lamp body, the installation position of each LED and the direction of the emitted light can be designed according to the height of the street lamp and the width of the road surface to achieve a good secondary light distribution function. The reflecting surface in this kind of lamps is only used as an auxiliary means for the three-time light distribution to ensure that the road illumination is more uniform.
The design of realistic road lighting fixtures can be adopted under the premise of basically setting the lighting direction of each LED. LED street lights fix each LED on the luminaire with a spherical universal joint. When the luminaire uses different heights and illumination widths, it can be used. By adjusting the spherical universal joint, the illumination direction of each LED can reach a satisfactory effect.