What are the advantages of LED street lights over high pressure sodium lights?


  High-power LED street lights are an alternative […]


High-power LED street lights are an alternative to high-pressure sodium lamps, and have the following advantages:

   One, unidirectional light
   The characteristics of the LED street light pole itself---the one-way light, no light diffusion, to ensure the light efficiency.

   Two, high light efficiency
  LED street light has a unique secondary optical design, which irradiates the light of the LED street light to the area that needs to be illuminated, further improving the light efficiency. The goal of energy saving has been achieved. At present, the LED light source efficiency 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 of power. Therefore, the overall luminous efficiency of LED street lamps is stronger than that of high-pressure sodium lamps.

   Three, high light 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 high pressure sodium lamps is only about 23, while the color rendering index of LED street lamps is above 70. From the perspective of visual psychology, it can achieve the same brightness. Sodium lamps have been reduced (refer to British road lighting standards.)

  Four, low light decay
The light decay of LED street lights is small, less than 3% in one year, and still meets the lighting requirements for road use in the year of use, while the high pressure sodium lamp has a big decay, which has dropped by more than 30% in about one year. Therefore, the design of the power used by LED street lights The upper can be lower than high pressure sodium lamps.

   Five, Energy saving and power saving
   LED street lights have automatic control energy-saving devices, which can achieve the greatest possible reduction in power and energy saving under the condition of meeting lighting requirements at different times.
  Is relatively safe to use. LED is a low-voltage device. The voltage to drive a single LED is a safe voltage, and 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. It is especially suitable for public places (such as street lighting, Factory and mine lighting, automotive lighting, civil lighting, etc.).

        Six, 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.

  Combining the above principles, the high-power LED street lamp has a significant energy saving effect, and it can save 60% of electricity instead of high-pressure sodium lamps. Although high-power LED street lamps have many advantages, it is currently difficult 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. Nevertheless, LED street lamps have the advantages of energy saving, long theoretical life, and environmental protection lamps. Today, when green and environmental protection are advocated all over the world, they are very dazzling and have received great attention and strong support from the government and industry.