The basic characteristics of LED light source

The application of LED light sources in the field of lighting is a product of the rapid development of semiconductor luminescent material technology and the concept of "green lighting" gradually gaining roots. "Green lighting" is a new concept that has not been proposed in the field of lighting in the foreign countries in the 1980s. The implementation of the "green lighting project" in China began in 1996. The important step to realize this plan is to develop and promote efficient and energy-saving lighting fixtures, save lighting power, reduce environmental and light pollution, and establish a lighting system that is high-quality, high-efficiency, economical, safe, reliable, and environmentally friendly. The basic features of LED light sources are:

1. High luminous efficiency After several decades of technical improvement, the luminous efficiency of LEDs has been greatly improved. Incandescent lamps and tungsten halogen lamps have a luminous efficiency of 12-24 lm/W, fluorescent lamps 50-70 lm/W, and sodium lamps 90-140 lm/W, and most of the power consumption becomes heat loss. LED light efficiency will be improved to reach 50 ~ 200 lumens / watt, and its light monochromaticity is good, narrow spectrum, without filtering can emit colored visible light directly. At present, all countries in the world have stepped up efforts to improve the research on LED luminous efficiency, and their luminous efficiency will be greatly improved in the near future.

2, the power consumption of LED single tube power 0.03 ~ 0.06 watts, using DC drive, single-tube drive voltage 1.5 ~ 3.5 volts, current 15 ~ 18 mA, the reaction speed, can operate at high frequency. In the case of the same lighting effect, the power consumption is one ten-thousandth that of incandescent light bulbs, and one-half of fluorescent tubes, as estimated by Japan, use LEDs that are twice as high as fluorescent lamps to replace the incandescent lamps and half of Japanese incandescent lamps. Fluorescent light. Each year can save the equivalent of 6 billion liters of crude oil. In the case of bridge parapet lights, the same effect of a fluorescent lamp is more than 40 watts, and the power of each LED using LED is only 8 watts, and it can change colorfully.

3, long service life using electronic light field radiation, filament burning easy to burn, heat deposition, light attenuation and other shortcomings. The use of LED lights small size, light weight, epoxy resin package, can withstand high-strength mechanical shock and vibration, not broken. The average life expectancy reaches 100,000 hours. The service life of LED lamps can be as long as 5 to 10 years, which can greatly reduce the maintenance cost of the lamps and avoid the difficulty of frequent lamp replacement.

4, safety and reliability of strong heat, low heat, no heat radiation, cold light source, can be safely arrived: can accurately control the light type and light angle, light color and soft, no glare; does not contain mercury, sodium and other elements may endanger health substance. The built-in micro-processing system can control the luminous intensity, adjust the luminous mode, and realize the combination of light and art.

5, is conducive to environmental protection LED is a full-solid light body, shock resistance, impact resistance is not easy to break, waste can be recycled, no pollution. The light source is small in size and can be freely combined. It is easy to develop into a light, thin, and short-sized lighting product, and is also easy to install and maintain. Of course, energy saving is the most important reason for considering the use of LED light sources. Maybe LED light sources are more expensive than traditional light sources, but with one year's energy saving to recover the investment of light sources, we can obtain several times of annual energy saving net income in 4 to 9 years. .