Characteristics of LED Light Source

LED light source (LED refers to light emitting diode) is a light emitting diode light source. This light source has the advantages of small volume, long service life and high efficiency, and can be used continuously for up to 100000 hours. LED light sources are widely used in LED bulbs, LED lamp cups, LED spotlight, LED downlights, LED ceiling lights and LED bean gall lamps. It is one of the mainstream trends of lighting sources at present.

LED light source mainly has the following characteristics:

1. It has large applicability, can be freely matched and combined to form a variety of LED light source lamps, which is easy to assemble. The volume is very small. Each unit led chip is a 3-5mm square, so it can be prepared into devices of various shapes, and is suitable for changeable environments.

2. Uniform lighting, soft light, no glare and no eye injury;

3. The response time is fast. The response time of incandescent lamp is millisecond and that of LED lamp is nanosecond

4. The color is pure and changeable. The bandwidth of LED is quite narrow. It is a discontinuous spectrum. The emitted color is pure and there is no stray light. It covers all bands of visible light, and can be combined into any desired visible light by R g B. Changing the current can change color. The LED can conveniently adjust the energy band structure and band gap of the material through chemical modification to realize the multi-color luminescence of red, yellow, green, blue and orange. For example, the red LED at low current can turn orange, yellow and finally green with the increase of current

5. High color rendering index and high luminous efficiency. After decades of technical improvement, the luminous efficiency of LED has been greatly improved. The light efficiency of incandescent lamp and tungsten halogen lamp is 12-24 lumens / watt, fluorescent lamp is 50-70 lumens / watt, sodium lamp is 90-140 lumens / watt, and most of the power consumption becomes heat loss. After improvement, the light efficiency of LED will reach 50 ~ 200 lumens / watt, and its light has good monochromaticity and narrow spectrum. It can directly emit colored visible light without filtering. Countries all over the world have stepped up the research on improving the luminous efficiency of LED, and its luminous efficiency will be greatly improved in the near future.

6. Long service life. Under normal current, the attenuation is the smallest, which is controlled to be less than 3% within 1000h. It adopts electronic light field radiation luminescence, which has the disadvantages of easy burning, thermal deposition, light attenuation and so on. The LED lamp has the advantages of small volume, light weight and epoxy resin packaging, which can withstand high-strength mechanical impact and vibration and is not easy to break. The average life span is 100000 hours. The service life of LED lamps can reach 5 ~ 10 years, which can greatly reduce the maintenance cost of lamps and avoid the pain of changing lamps frequently.

7. Safe and reliable, wide range of use. Led uses low-voltage power supply, all working below 50V. It is a safer power supply than high-voltage power supply, especially suitable for public places. Low calorific value, no thermal radiation, cold light source, safe touch: can accurately control the light type and luminous angle, soft light color, no glare; It does not contain mercury, sodium and other substances that may endanger health. The built-in micro processing system can control the luminous intensity and adjust the luminous mode to realize the combination of light and art.

8. Green environmental protection, no pollution. LED is an all solid luminescent body, which is shock resistant, impact resistant, not easy to break, and the waste can be recycled without pollution. The light source is small in volume and can be combined at will. It is easy to develop into light, thin and short small lighting products, and it is also convenient for installation and maintenance. Of course, energy saving is the main reason why we consider using LED light source. Perhaps led light source is more expensive than traditional light source, but it takes one year of energy saving to recover the investment of light source, so as to obtain several times the net income period of energy saving every year in 4 ~ 9 years.