1. Its own characteristics -- the unidirectivity of light, no light diffusion, ensuring the illumination efficiency.
2. LED street lamp has a unique secondary optical design, which can illuminate the light of LED street lamp to the required lighting area, further improving the lighting efficiency and achieving the purpose of energy conservation.
3. LED has reached 110-130lm/W, and there is still great room for development, with theoretical value reaching 360lm/W. However, the luminous efficiency of high pressure sodium lamp increases with the increase of power. Therefore, the overall luminous efficiency of LED street lamp is stronger than that of high pressure sodium lamp. (the overall light efficiency is theoretical, but in fact the light efficiency of 250W or more high-pressure sodium lamps is higher than that of LED lamps.)