Difference between LED street light and traditional high pressure sodium lamp

Dec 14, 2019

Compared with traditional high-pressure sodium lamps, LED street lights have the following advantages:

1. Energy saving: The light source efficiency of LED has reached 110-130lm / 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 only increases with the increase of power. Therefore, the overall luminous efficiency LED street lights are stronger than high-pressure sodium lamps; using high-power LED light sources with high-efficiency power sources, the actual lighting effect has been tested and compared with the high-pressure sodium lamps currently used on the road Energy saving is over 60%, and there is still much room for technological progress. With the rapid improvement of LED efficiency, LED street lights have shown great potential in terms of energy saving.

2. Good color rendering: The light color rendering of LED street lamps is much higher than that of high-pressure sodium lamps. The color rendering index of LEDs is high (75 ~ 80), and the color rendering index of high-pressure sodium lamps is only about 23. From the perspective of visual psychology, it achieves the same brightness. , On average, the illuminance of LED street lamps can be reduced by more than 20% compared to high-pressure sodium lamps. And the road looks brighter, feels more comfortable, and the driver feels safer.

3, long life: LED street light has a small light decay, less than 3% of light decay in a year, 10 years of use still meets road lighting requirements, and high-pressure sodium light decay, has fallen by more than 30% in about a year, so , LED street lights in the use of power design can be lower than high-pressure sodium lamps, but the life is longer.

4, green environmental protection: LED does not contain harmful metals such as mercury and heavy metals, will not produce pollutants, unlike high-pressure sodium lamps or metal halide lamps when it is discarded to cause harm to the environment.

5. Low maintenance cost: Based on the current technology level and test results, high-power LED light sources can be used normally for 10 years without replacement, while traditional high-pressure sodium lamps need to be replaced once every one and a half years. The use of LED light sources can greatly reduce maintenance costs. .

6, color temperature optional: LED can meet the needs of color temperature in different occasions. Indoor and outdoor color temperature requirements are different. Home lighting and commercial lighting are not the same. In addition, some stores need alternative LED white light to make their products more stylish and sophisticated. Color appetite for shoppers. However, the color temperature of the high-pressure sodium lamp is too low, which makes people feel depressed and hypnotic. Yellow light in summer may give people a feeling of heat.

7, high safety factor: LED street lights are low-voltage products, of course, this is for solar LED street lights, 12V is enough, the mains LED street lights are still 220V voltage.

8. No flicker: LED street lights can respond quickly, shorten the lighting time, and no flicker will occur, which is most suitable for protecting eyes.