Countries actively promote the implementation of energy-saving emission reduction projects, in particular, China's LED lights due to large business opportunities and attention by LED lamp manufacturers. Therefore, the development of new energy-efficient, energy-saving, long life, high color rendering index, environmental protection, high-pressure sodium lamp, low power consumption, low power consumption, low power consumption, Of the lights on the city of energy-saving lighting has a very important significance.
LED street light features:
High-power LED street lamps and conventional high-pressure sodium lamp is different, high-power LED street light source using low-voltage DC power supply, by the GaN-based power-based blue LED and yellow phosphor synthesis of high efficiency white light-emitting diodes, light-emitting diodes (Light Emitting Diode LED) is based on the formation of the semiconductor PN junction with a weak power can be light-emitting high-efficiency solid-state light source, a certain forward bias voltage and injection current, injected into the P-hole and injected into the N region in the diffusion of electrons to After the source area of radiation by the composite photon, the electrical energy directly into light energy.
LED light source as a street light, it and the traditional street light source has many advantages.
1, LED street light itself has a directivity of light, no light diffusion to ensure light efficiency;
2, LED street lamp has a unique secondary optical design, the LED lights to illuminate the required lighting area, that is, road, to further improve the lighting efficiency, to achieve energy-saving purposes;
3, LED light source efficiency has reached 100lm / W, and there is still much room for development, the theoretical ＆#118alue can reach 250lm / W. The high pressure sodium lamp luminous efficiency is increased with the increase in power, therefore, the overall luminous efficiency LED lights than high pressure sodium lamp;
4, LED street light color rendering than high pressure sodium, high pressure sodium lamp color rendering index is only 23 or so, and LED street lamp color rendering index can reach 75 or more, from the visual psychological point of view, to the same brightness, LED street light illumination average can More than 20% lower than the high pressure sodium lamp (see the British road lighting standards); Moreover, in the intermediate visual level, the human eye in high color temperature environment than the low color temperature environment easier to identify things, to avoid some dangerous state;
5, LED street light decay, a year of light decline less than 3%, the use of 10 years to reach road lighting requirements, therefore, LED lights in the use of power design can be lower than the high pressure sodium lamp;
6, LED lights can be automatically dimmed, to achieve different periods of time to meet the lighting requirements, the maximum possible to reduce power and save energy;
7, LED is a low-voltage DC devices, single LED driver voltage is safe voltage, so it is a safer than the use of high-voltage power supply, especially for public places. DC characteristics make LED particularly suitable for solar energy, wind power combined;
8, each unit LED die is only a small volume, it can be prepared into various shapes of devices, and suitable for volatile, easy to shock environment;
9, long life: theoretical life can use 50,000 hours or more;
10, LED can be frequent switching without fear of damage;
11, easy to install: directly to the LED street lamp installed in the light pole to replace the original sodium lamp
