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Feasibility of 20W Solar Street Light Transformation

View: 102403/03/2020  

1. The light source efficiency of 20W solar street light reaches 100lm / W, and there is still a lot of space for development. The theoretical value is 250lm / W. the luminous efficiency of high-pressure sodium light increases with the increase of power, so the overall efficiency of solar street light is better than that of high-pressure sodium light.

20W solar street light

2. The 20W solar street light has a unique secondary optical design, which irradiates the solar road to the required lighting area, further improving the lighting efficiency, to achieve the goal of energy saving.

3. The characteristics of solar road bulb itself - unidirectional light, non-proliferation of light, ensure lighting efficiency, light color rendering is much higher than high-pressure sodium light. The color rendering index of high-pressure sodium light is only about 23, and the color rendering index of solar street light is 75 or higher. From the perspective of visual psychology, the brightness is equal, and the average value of solar energy circuit can be reduced by more than 20% compared with high-pressure sodium light (refer to British reasonable lighting standard).

4. The light attenuation of solar street light is small, less than 3% in one year and the road lighting requirements are still used 10 years later. The high-pressure sodium light has large fading, which has decreased by more than 30% in a year or so. Therefore, solar street light can be designed to use lower power than high-pressure sodium light.

5. The solar street light has an automatic control energy-saving device, which now meets the lighting requirements at different times to reduce the maximum possible power and save energy.

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