The LED street lamp with a special light shape design can shift the light angle of the street lamp and improve the utilization of road lighting; according to the rectangular aspect ratio, it can produce a light spot with an aspect ratio of 2:1. So that there is no shadow between adjacent light spots, and light is formed on the road. The uniform lighting belt makes it more suitable for the lighting design of traffic roads. It can satisfy a wide range of illumination without increasing the height of the lamp pole. Improve the efficiency of street lighting, reduce the power density of street lighting, and realize energy saving and environmental protection of high-power LED street lamps. Compared with traditional high-pressure sodium lamps, road lighting has unparalleled advantages:
1. The light-emitting mechanism is different. Since the LED street lamp is a semiconductor device, its effective life can reach 50,000 hours (that is, the light loss is less than 30% after 50,000 hours), which is much higher than that of sodium lamps and metal halide lamps (its life is about 12,000 -15000 hours).
2. Since traditional street light sources use mercury vapor mechanism to emit light, the disposal of waste light sources is an urgent problem in the world. At the same time, the light-emitting mechanism of the traditional light source determines that it will produce harmful ultraviolet radiation to the human body. The LED street light source is solid-state lighting, does not contain harmful substances such as mercury, does not emit ultraviolet radiation, and is an environmentally friendly light source.
3. Since the LED street lamp is a kind of semiconductor material, there is no additional materials such as filament, and it has good seismic performance.
4. Traditional gas discharge lamps, such as high-pressure sodium lamps, have a preheating process when starting, which wastes energy and is not conducive to intelligent control. Due to the essential difference of the light source, LED street lights do not have the problem of "start-up time", they can work normally immediately after power-on, and it is very convenient and systematic to realize intelligent energy-saving control.
5. The color rendering index of the LED street light source can reach above 80, which is close to natural light. In this case, the human eye can easily distinguish things, which is conducive to driving safety; while the color rendering index of high pressure sodium lamps is only 20-30.