1. The characteristics of the LED street light itself - the unidirectionality of light, without the diffusion of light, to ensure the light efficiency.
2. The LED street light has a unique secondary optical design, which irradiates the light of the LED street light to the area that needs to be illuminated, further improving the lighting efficiency and achieving the purpose of energy saving.
3. The light source efficiency of the LED road has reached 110-130lm/W, and there is still a lot of room for development, with a theoretical value of 250lm/W. The luminous efficiency of high-pressure sodium lamps increases with the increase of power. Therefore, the overall luminous efficiency of LED street lamps is stronger than that of high-pressure sodium lamps; efficiency is higher than LED).
4. The light color rendering of LED street lamps is much higher than that of high-pressure sodium lamps. The color rendering index of high-pressure sodium lamps is only about 23, while the color rendering index of LED street lamps is above 75. From the perspective of visual psychology, to achieve the same brightness, the average illuminance of LED street lamps can be It is more than 20% lower than that of high pressure sodium lamps.
5. The light decay of LED street lights is small, less than 3% in one year, and it still meets the requirements of road use illuminance after 10 years of use, while the high pressure sodium light decays greatly, which has dropped by more than 30% in about a year. Therefore, LED street lights are in The power used can be designed to be lower than that of high pressure sodium lamps.
