I.LED street lamp refers to the street lamp made with LED light source, which has the unique advantages of high efficiency, safety, energy saving, environmental protection, long life, fast response, high color rendering index, and is of great significance to urban lighting energy saving.
Road lighting is an important part of urban lighting. Traditional street lamps are often used. High pressure sodium lamps emit light up to 360 degrees. At present, the global environment is deteriorating day by day, and all countries are developing clean energy. With the rapid growth of national economy, the contradiction between energy supply and demand in China is becoming increasingly prominent, and there is a serious shortage of power supply. Energy conservation is an urgent problem to be solved. Therefore, the development of new efficient, energy saving, long life, high color rendering index, environmental protection LED street lamp is of great significance to the energy saving of urban lighting.
Road lighting is closely related to people production and living, with the speeding up of urbanization in our country, LED street lamp with directional light, low power consumption, good drive performance, fast response, high seismic ability, long service life, green environmental protection advantages of gradually into people's horizons, to become the world's most advantages instead of traditional light source of a new generation of energy-saving light source, therefore, LED lights will be the best choice of the road lighting energy saving reconstruction.
III.The characteristics of it:
Different from conventional street lamps, LED light source adopts low-voltage dc power supply, high efficiency white light synthesized by gan-based blue light LED and yellow, which has the unique advantages of high efficiency, safety, energy saving, environmental protection, long life, fast response, high color rendering index, and can be widely used in roads. The outer cover can be made and can withstand high temperature up to 135 degrees and low temperature up to -45 degrees.
1. Its own characteristics -- the unidirectivity of light, no light diffusion, ensuring the illumination efficiency.
2. LED street lamp has a unique secondary optical design, which can illuminate the light of LED street lamp to the required lighting area, further improving the lighting efficiency and achieving the purpose of energy conservation.
3. LED has reached 110-130lm/W, and there is still great room for development, with theoretical value reaching 360lm/W. However, the luminous efficiency of high pressure sodium lamp increases with the increase of power. Therefore, the overall luminous efficiency of LED street lamp is stronger than that of high pressure sodium lamp. (the overall light efficiency is theoretical, but in fact the light efficiency of 250W or more high-pressure sodium lamps is higher than that of LED lamps.)
4, LED street lamp light color display performance is much higher than high-pressure sodium lamp, high-pressure sodium lamp color index is only about 23, and LED street lamp color index reaches more than 75, from the perspective of visual psychology, reach the same brightness, LED street lamp illumination average can be more than 20% lower than high-pressure sodium lamp,.
5, light decay, a year of light decay is less than 3%, use 10 years still reach the road requirements, and high pressure sodium lamp decay, a year or so has dropped more than 30%, therefore, LED street lamp in the use of power design can be lower than high pressure sodium lamp.
6. LED street lamp is equipped with automatic control energy-saving device, which can reduce the power as much as possible and save electric energy under different lighting requirements at different time periods. Can achieve computer dimming, time control, light control, temperature control, automatic inspection and other humanized functions.
7, long life: can use more than 50,000 hours, provide three years of quality assurance. The drawback is that the life of the power supply is not guaranteed.
8. High light efficiency: the chip ≥100LM is adopted, which can save more than 75% energy compared with traditional high-pressure sodium lamp.
9. Easy installation: no need to add buried cables, no need for rectifier, etc., directly connect the lamp pole or embed the light source into the original lamp shell.
10. Excellent heat dissipation control: the temperature in summer is controlled below 45 degrees, and passive heat dissipation mode is adopted to ensure insufficient heat dissipation in summer.
11. Reliable quality: the circuit power supply adopts all high-quality components, and each LED has its own over-current protection, so there is no need to worry about damage.
12. Uniform light color: no lens, no sacrifice of uniform light color to improve brightness, so as to ensure uniform light color without aperture.
13. LED does not contain harmful metal mercury, which will not harm the environment when scrapped.
The energy saving effect of the above principle is remarkable, replacing the high pressure sodium lamp can save more than 60% electricity.
Low maintenance cost: compared with traditional street lamps, LED street lamps have very low maintenance cost. After comparison, all the investment cost can be recovered in less than 6 years.
1. Low power of single LED. In order to obtain high power, multiple parallel use is required.
2. Low color rendering. The color displayed under LED irradiation is not as real as that of incandescent lamp, which should be analyzed from the spectral distribution, which is a technical problem.
3. Light spots. Due to the defects in the manufacturing process of white LED and the matching error with the reflecting cup or lens, it is easy to cause the "yellow circle" problem.
4. LED irradiation uniformity. If the secondary optical design is not carried out, the LED irradiation is relatively concentrated, so the secondary optical design must be carried out to make its light intensity distribution pattern look like a bat.
5. LED light decay. Compared with the low power LED, the high power LED street lamp light decay will be much better. But low-power leds emit little heat. However, there is no way to solve the problem of high-power LED cooling, and the brightness will be significantly reduced after heating, so the power cannot be increased. The largest Spark LED street lamp sold in the market is 360W.