What are the advantages of LED street lights over high-pressure sodium lamps?
2024-10-23
High-power Led Street Lights are an product to high-pressure sodium lamps, with the following advantages:
1. Unidirectional light The inherent property of LED Street Light poles is unidirectional light which ensures light efficiency without diffuse reflection.
2. High light efficiency LED Street Lights have a unique secondary optical design that directs the light to the required illuminated area further enhancing light efficiency. This has already achieved the purpose of energy saving. Currently, the light source efficiency of LEDs has reached 100lm/w, there is still a lot of room for improvement, with a theoretical value of 200lm/w. However, the light efficiency of high-pressure sodium lamps only with increasing power, so the overall light efficiency of LED street lights is stronger than that of high-pressure sodium lamps.
3. High color rendering The color of LED street lights is much higher than that of high-pressure sodium lamps. The color rendering index of high-pressure sodium lamps is only around 23, while of LED street lights is over 70. From the perspective of visual psychology, to achieve the same brightness, the illuminance of LED street lights can be than that of high-pressure sodium lamps (referring to the British road lighting standard).
4. Lower light decay The light decay of LED street lights is small with less than 3% decay in a year, and it still meets the road lighting requirements after years of use. However, the light decay of high-pressure lamps is large, with a decline of more than 30% in just one year. Therefore, the design power of LED street lights can be lower than of high-pressure sodium lamps.
5. Energy saving and electricity conservation LED street lights have an automatic control energy-saving device that can lower the power to the maximum while meeting the lighting requirements of different times, thus saving electricity.
6. Safer to use LEDs are low-voltage devices, and the voltage for a single LED is a safe voltage. Each LED in the series has a power of only 1 watt, so it is safer than using high-voltage power especially suitable for public places (such as road lighting, factory lighting, car lighting, and civilian lighting).
7. Easy to maintain Each unit of the LED chip is very small, so it can be made into various shapes and is suitable for changing environments. In summary, the energy-saving effect of high-power LED street is significant, with a power saving of 60% compared to high-pressure sodium lamps. Although high-power LED street lights have many advantages, they are currently to replace high-pressure sodium lamps on a large scale. The main reason is that the quality of LED street lights is not stable enough and the cost is too high Nonetheless, LED street lights have the advantages of energy saving, long theoretical life, and environmental protection, which are particularly prominent in today's world that advocates green environmental, and have received high attention and strong support from the government and the industry.