Streetlights are an important part of urban lighting , often using traditional high pressure sodium lights , high pressure sodium 360 degree light , the big disadvantage of the loss of light caused a huge waste of energy. Currently, the global environment is deteriorating, countries are developing clean energy . With the rapid growth of the national economy, China's energy supply and demand have become increasingly prominent , there is a serious power supply shortage began situation , energy is the urgent problem . Therefore, the development of new high efficiency, energy saving, long life, high color rendering index , environmentally friendly LED lights have great significance for the city lighting energy .
Road lighting production and life are closely related with people , with the acceleration of urbanization process in China , LED lights with directional light, low power consumption , good driving characteristics , fast response , high shock resistance , long life, environmental protection and other advantages of gradually go into people's vision , a new generation of the world's most energy-efficient light sources to replace traditional advantages , therefore , LED lights will become a road lighting energy-saving choice.

LED lights with conventional high-pressure sodium lamps is different, high-power LED street light uses low voltage DC power supply, the power -type GaN-based blue LED and yellow phosphor synthesis of efficient white LED , high efficiency, safety , energy saving, environmental protection , long life , response speed, higher CRI unique advantages , can be widely used in urban road lighting . Housing available PC tube production, high temperature of 135 degrees , low temperature of -45 degrees.
A light emitting diode (LightEmittingDiode, abbreviated as LED) with a weak power is based semiconductor PN junction can be formed by solid-state light emitting efficiency , the forward bias voltage and a current injected into the injection zone and the hole injecting P N electron diffusion region in the active region to be issued by the radiative recombination photons of light energy directly into electrical energy .
Advantage
1, the characteristics of the LED street lamp itself - unidirectional , no light diffusion light to ensure the efficiency of light .
2, LED lights have a unique optical design , the LED lights illuminating light shines on the desired area , and further improve the light efficiency to save energy.
3 , the efficiency of the LED light source has reached the 110-130lm / W, but there is still much room for development, the theoretical value of 360lm / W. The luminous efficiency of the high-pressure sodium lamp is only increased with the increase in power , therefore , the overall light efficiency LED lights stronger than high pressure sodium ; ( the overall light efficiency is theoretically , in fact, more than 250W HPS light efficiency is higher than LED) .
4, LED street light CRI higher than HPS lot, high pressure sodium lamp color rendering index of only 23 , while the LED lights color rendering index of 75 or more, from the visual psychological point of view , to achieve the same brightness, illumination LED lights mean you can HPS lower than 20 % (see the British road lighting standards ) .
5 , the light fades, a year less than 3% of the light fades , still reached a 10 -year road illumination requirements, and high-pressure sodium lights big decline , about a year has fallen more than 30% , therefore , LED lights use power designed to be lower than the high-pressure sodium lamps.
6, LED street light energy saving automatic control device, can be achieved in time to meet the lighting requirements of different situations to reduce the maximum possible power to save energy. Spark intelligent LED lights dimming can be achieved computers , sub- time control , lighting control, temperature control, remote control, automatic inspection and other user-friendly features .
7, LED is a low-voltage devices , single LED driving voltage of safe voltage , single LED power products are 1 watt , so it is a more secure than using a high voltage power supply , especially for public spaces ( such as: street lighting , industrial lighting, automotive lighting, commercial lighting, etc. ) .
8 , each unit is only a small piece LED small size, it can be prepared into various shapes of devices, and for the environment variable .
9 , long life: more than 50,000 hours can be used to provide quality assurance for three years . Deficiencies is the power of life can not be guaranteed .
10 , high luminous efficiency : ≥ 100LM using more chips , as opposed to traditional high pressure sodium lamp can save more than 75%.
11 , installation is simple : no Jiamai cable without rectifiers , etc., directly to the street light poles installed in or connected to the original light source nested shells.
12 , excellent thermal control : Summer temperature controlled at 45 degrees, and the use of passive cooling , lack of summer heat protection.
13 , reliable : the power circuit used in all high-quality components , each LED has a separate over-current protection , without fear of damage .
14 , light color uniform : without lens, not to increase the brightness at the expense of uniform light color , thus ensuring no aperture light color uniform .
15, LED does not contain toxic metals mercury , unlike high pressure sodium or metal halide lamps in damage to the environment when discarded .
Taking these principles , high-power LED street light energy saving effect is remarkable, instead of the high-pressure sodium lamp can save more than 60 %. ( Be fine )
Low maintenance costs : Compared with traditional lamps, LED street light maintenance costs low , by comparison , less than six years to recover the full cost of inputs .