Why LED solar street lights can perfectly replace high-pressure sodium lamp street lights?
LED solar street light is an alternative product of high-pressure sodium lamp, it has the following advantages:
1. One-way light. The characteristics of the LED solar street light pole itself-the one-way light, no light diffusion, to ensure light efficiency.
2. Strong light effect. The LED solar street light has a unique secondary optical design, which irradiates the light of the LED solar street light to the area that needs to be illuminated, further improving the light efficiency. The energy-saving goal has been achieved. At present, the efficiency of the LED solar light source has reached 100lm/w, and there is still a lot of room for development, the theoretical value reaches 200lm/w. The luminous efficiency of high-pressure sodium lamps increases with the increase in power. Therefore, the overall luminous efficiency of LED solar street lamps is stronger than that of high-pressure sodium lamps.
3. High light colour rendering. The light colour rendering of LED solar street lights is much higher than that of high-pressure sodium lights. The colour rendering index of high-pressure sodium lights is only about 23, while the colour rendering index of LED street lights is above 7. From the perspective of visual psychology, the same brightness can be achieved. The high-pressure sodium lamp is lowered.
4. Light decay is small. The light decay of LED solar street lights is small, while the decay of high-pressure sodium lights is large, and it has been reduced in about a year. Therefore, the design of LED street lights can be lower than high-pressure sodium lamps.
5. Energy-saving and electricity saving. The LED solar street light has an automatic control energy-saving device, which can achieve the greatest possible reduction in power and save energy under the condition of meeting the lighting requirements at different times.
6. It is relatively safe to use. LED solar energy is a low-voltage device. The voltage for driving a single LED is safe. The power of a single LED in the series is 1 watt. Therefore, it is a safer power supply than the use of high-voltage power supplies, especially suitable for public places.
7. Easy to maintain. Each unit LED chip has only a small volume, so it can be prepared into various shapes of devices and is suitable for changing environments.