Low carbon environmental protection LED street lamps will occupy the throne in urban lighting

Lamp is an important part of city lighting, traditional street lamps used high-pressure sodium lamp, the overall light low pressure sodium lamp caused a huge waste of energy, therefore, the development of efficient, energy saving, long life, high color rendering index, environmental protection is very important for city street lamp lighting energy-saving significance. LED as a light source, it has many advantages compared with the traditional street light source.

One, LED is a semiconductor diode, its life is very long. When the luminous flux is reduced to 80%, the service life is up to 25000 hours. The life of the metal halide lamp is 6000~12000 hours, and the service life of the high-pressure sodium lamp is 12000 hours.

Second, the basic structure of LED is an electroluminescentsemiconductor materials, placed on a wire rack, then sealed with epoxy resin around, to protect the internal core function, so the seismic performance of LED is good.

Third, white LED color better than high pressure sodium lamp. In the middle of the visual level, the human eye in the high temperature environment under low color temperature environment more easily identify things. The color of white LED is also much better than the high pressure sodium lamp, high pressure sodium lamp color rendering index is only 20 right left, and white LED can reach 65~80.

Fourth, LED to achieve the dimming function more perfect. Because of the wide range of LED, the light output is proportional to the working current, so it can reduce the current to adjust the light. In addition, due to frequent LED switch without too much damage to the LED, the light can also be used to obtain the pulse width adjustment method, by adjusting the duty ratio of the voltage and frequency, can effectively adjust the luminous intensity of LED.

Fifth, in the optical system of lamp, LED light flux loss minimum. Different from the traditional light source, LED is a half space light source. High pressure sodium lamp or metal halide lamp is a light source of the whole space, the need for the 1.5 space out of the light to change the direction of 180 degrees into the other half of the space. When we rely on the reflector to complete, light absorption and light source on the light reflector itself is inevitable. The use of LED as a light source, there will be no loss of this area, the utilization rate of light than the traditional light source. Finally, the LED light source does not contain harmful metal mercury, unlike high pressure sodium lamp or metal halide lamp in the waste caused by environmental hazards.

At present, preliminary investment of LED lighting is still troubled by one of our major problems. On the market LED light efficiency is rapidly increasing, while the price is lower. Compared with the environmental protection and energy saving of LED, the conventional fossil energy is becoming more and more tense, and it will cause serious pollution to the environment after use. Therefore, as a kind of outdoor lighting, LED lighting will show us infinite vitality and broad prospects.