1. Its own characteristics - the unidirectionality of light, no light diffusion, to ensure the efficiency of light;
2. The LED street lamp has a unique secondary optical design, which irradiates the light of the LED street lamp to the required lighting area, further improving the lighting efficiency, so as to achieve the purpose of energy saving;
3. LED has reached 110-130lm / W, and there is still a lot of room for development, and the luminous efficiency of high-pressure sodium lamp increases with the increase of power, so the overall luminous efficiency of LED street lamp is stronger than that of high-pressure sodium lamp (the overall luminous efficiency is theoretical, in fact, the luminous efficiency of high-pressure sodium lamp above 250W is higher than that of LED lamp);
4. The color rendering performance of LED street lamp is much higher than that of high-pressure sodium lamp. The color rendering index of high-pressure sodium lamp is only about 23, while the color rendering index of LED street lamp is more than 75. From the perspective of visual psychology, to achieve the same brightness, the illumination of LED street lamp can be reduced by more than 20% than that of high-pressure sodium lamp;
5. The light attenuation is small, less than 3% in one year, and it still meets the road requirements after 10 years of use, while the high-pressure sodium lamp is large, which has dropped by more than 30% in one year. Therefore, the design of LED street lamp can be lower than that of high-pressure sodium lamp;
6. LED street lamp has automatic control energy-saving device, which can reduce power and save electric energy to the greatest extent under the condition of meeting the lighting requirements of different periods. It can realize the humanized functions of computer dimming, time division control, light control, temperature control, automatic inspection, etc;
