1. The light source efficiency of LED has now reached 100LM/W, and there is still a lot of room for development. The theoretical value is 250lm/W. The luminous efficiency of high -pressure sodium lamps increases with the increase in power. Therefore, the overall light -efficient solar street light is stronger than high -pressure sodium lamps;

2. Solar street lights have a unique secondary optical design. The light of solar street lights is shot to the required lighting areas, which further improves the efficiency of light to achieve the purpose of energy saving;

3. The characteristics of solar street lights themselves-the one-way nature of light, no light shot to ensure light efficiency;

4. The color of solar street lights is much higher than the high -pressure sodium lamp. The high -pressure sodium lamp color rendering index is only about 23, while the solar street light color rendering index reaches 75 or more. From the perspective of visual psychology, the same brightness can be reached. A decrease of more than 20%compared to high -pressure sodium lamps, (refer to the British principle lighting standard);

5. The light decay of solar street lights, less than 3%of the light decay a year, still meets the road usage requirements for 10 years, and high -pressure sodium lights are dying, which has dropped by more than 30%in about one year. Therefore, solar street lights are in The design of the use of power can be lower than high -pressure sodium lights;

6, solar street lights have automatic control energy -saving devices, which can realize the maximum possible reduction power when lighting requirements at different times, saving power energy