What are LEDs?

  As to what are LEDs, they are small light sources that become illuminated by the movement of electrons through a semiconductor material. LEDs is short for Light-emitting diode, can be integrated into all sorts of products to provide red green blue yellow and white light, such as flashlights, light bulbs, and integrated light fixtures. The LEDs can be divided into Low-Powered LEDs and High-Powered LEDs. Low-Powered LEDs used to draw attention to something, such as an exit sign, a green power button on a computer, or a red blinking etc and High-Powered LEDs used to illuminate an area. ENERGY STAR qualified LED lighting uses multiple illuminator LEDs inside a fixture to produce white light.

  We should talk about LED from two sides, the advantages and disadvantages.

  With the regard to the advantages:

1.      High luminous efficiency.

2.      Energy-saving.

3.      Long life service. It can be 50,000 ～ 100,000 hours.

4.      Lightening in gold-white color being strong to transmit in fog.

5.      Small volume. It can be smaller than 2mm.

6.      Various color of yellow - green, amber, red, etc.

7.      Spacious gamut.

  As for the disadvantages, the top one is heat dissipation. This problem will reduces the lifespan of LED, as a result, how resolve heat problem of electron component effectively is urgent affairs that society development have to face at present. And then the problem is costs, LED lights are somehow expensive to begin with than the others. It is very rare to see them used in certain applications since it is not widely accepted as an alternative for other light sources such as fluorescent and incandescent lights. It only emits a single direction of light which is not applicable to be used in wide open spaces. Last but not the least, directional light is so strong that to consider the special optical quality of LED when designing the Luminaries.

  All in all, LED is the emerging industry with a promising market, all of us should to get some knowledge about it.