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First, one-way light
LED lamp pole itself --- one-way light characteristics, there is no light diffusion, to ensure the efficiency of light.
Second, high luminous efficiency
LED street lamp has a unique secondary optical design, the LED street light illumination to the desired lighting area, to further improve the lighting efficiency. Has achieved energy-saving purposes. At present, LED light source efficiency has reached 100lm / w, but there is still much room for development, the theoretical value of 200lm / w. The high pressure sodium lamp luminous efficiency is increased with the increase of power, therefore, the overall light-efficient LED street lamp is stronger than the high pressure sodium lamp.
Third, high light color
LED street light color rendering is much higher than the high-pressure sodium lamp, high-pressure sodium lamp color rendering index is only about 23, while the LED street lamp color rendering index of 70 or more, from the visual psychological point of view, to achieve the same brightness, LED lights average illumination than high- The sodium lamp has been reduced (see British road lighting standards.)
Fourth, the light fades smaller
LED street light decline is small, less than 3% a year of light failure, the use of the road is still used to meet the lighting requirements, and high-pressure sodium lamp decay, about a year or so has dropped 30%, so LED lights in the use of power design It can be lower than high pressure sodium lamp.
Five, energy saving
LED lights have automatic control of energy-saving devices that can meet the lighting requirements in different periods of time the maximum possible reduction of power, save energy.
Use relatively safe. The LED is a low-voltage device that drives a single LED at a safe voltage. The series has a single watt of power each, so it is a safer power supply than high-voltage power supplies and is especially suitable for use in public places (eg street lighting, Factory lighting, car lighting, civil lighting, etc.).
Six, easy to maintain
Each cell LED chip has only a small volume, so it can be prepared into a variety of shapes of the device, and is suitable for volatile environments.
The above principle, high-power LED street lamp energy-saving effect is significant, instead of high-pressure sodium lamp can save 60%. Although high-power LED street lamps have many advantages, it is currently difficult to replace large-scale high-pressure sodium lamps. The reason, mainly the quality of LED lights is not stable enough, the cost is too high. In spite of this, LED street lamp possesses the advantages of energy saving, long theoretical life and environmental protection light. It is very bright today that all over the world advocate green environmental protection, which has received great attention and strong support from the government and the industry.

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