China Led Street Light Technology Development Status And Problems Of-led, Lamps, Lighting - Lighting

Countries to actively promote the implementation of energy saving projects

, especially in China LED Because of the huge business opportunities lamp LED lamp manufacturers have been seriously affected. Street lighting is an important part of the city, the traditional street lamps often used high-pressure Sodium lamp , High pressure sodium and low overall efficiency coating defects caused by the enormous waste of energy, therefore, the development of new high efficiency, energy saving, long life, high color rendering index, Environmental protection The lights of the city lighting energy conservation is of great significance. Characteristics of today's LED lights

High-power LED street lamp with conventional high pressure sodium lamps is different is that high-power LED street lamp light source with low voltage DC power supply, the power-type GaN-based blue LED and yellow phosphor synthesis of highly efficient white light diodes, light emitting diodes (LightEmittingDiode , abbreviated as LED) is based on the formation of semiconductor PN junction with a weak high-power solid-state LED light source can, in certain positive bias voltage and injection current into the P region into the hole and the N region Electronic Spread to the active zone in radiative issued by the photon light energy directly into electrical energy.

LED lamp as light source, which compared the traditional lamp light source has many advantages.

1, LED street light, point of itself, does not diffuse light, to ensure optical effect;

2, LED lamp has a unique secondary optical design, LED street lamp light shines on the area required for lighting, that is the road to further improve the light efficiency and save energy;

3, LED light source in the efficiency of current reached 100lm / W, and there is great room for development, the theoretical value can reach 250lm / W. The high pressure sodium light-emitting efficiency is only increased with the power to increase, therefore, the overall optical efficiency LED lights stronger than the high-pressure sodium lamp;

4, LED street light than the color of high pressure sodium lamp, high pressure sodium color index is only 23, while the LED lamp color rendering index can reach 75 or more, from the visual psychological point of view, to achieve the same brightness, LED street lamp The average light intensity lower than the 20% high-pressure sodium lamp (lighting the light of British standard); and, in the middle of the visual level, the human eye in high color temperature environments with low color temperature of the environment than to identify things more easily, avoiding the occurrence of certain dangerous state ;

5, LED street light decline of small, one-year decline of less than 3% of light, using 10 years of road use is still to achieve illumination requirements, therefore, LED street lamp design, the use of power can be lower than the high-pressure sodium lamp;

6, LED lights that automatically adjust light, can achieve to meet the lighting requirements at different times, the maximum possible reduction in power, saving energy;

7, LED is a low-voltage direct current devices, drive voltage single LED voltage for safety, so it is a high-pressure than the use of Power supply More secure power supply, especially for public places. DC characteristics particularly suited to LED and solar energy, wind power to combine;

8, each unit LED only a very small grain size, it can be fabricated into various shapes of the device, and suitable for volatile and easy to shock the environment;

9, long life: theory life could use more than 50,000 hours;

10, LED can be frequent switch and forget about the damage;

by: gaga

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