A Brief Introduction For Illumination

      Mankind has entered the age of brightness since Thomas Edison invented carbon filament incandescent lamp in 1879. When we look back the illumination history, new light source emerged in endless stream, for example fluorescent lamp, mercury lamp, high/low pressure sodium lamp, metal halide lamp, compact fluorescent lamp, high frequency energy-saving fluorescent lamp, microwave lamp and so on.  But since the day carbon filament incandescent lamp was invented, the flaws have never been neglected by people. Such as: When tungsten filament is heated, it costs too much energy. It is very fragile for lamp bulb and very easy to get an electric shock. Fluorescent lamp consumes less energy than incandescent lamp, it is very bad for eyesight and the mercury in the tube is very bad for human body and environment. LED  is an illumination technology revolution product which transforms electronic power into visible light. Compared with traditional lighting technology, the biggest difference is its structure and material. It has upper electrode and lower electrode, it is conductor material and luminous material between them. Furthermore, the color of light would change according to different situations.

        LED is one of solid cold light sources. It is not only much smaller, lighter and firmer, but also lower voltage and longer serving time. Though according to traditional light effect definition, it seems that the effect of LED is not so high. LED’s efficiency can reach 80%-90% in the visible light area, meanwhile it is only 10%-20% for incandescent lamp in the same amount of light effect. Furthermore, one single LED’s consumption is usually from 0.05w to 1w. A group of LED that could be made to different kind of shapes meets various purposes.

        As a new green product, LED is the inevitable trend of future development. It will be the age of LED illumination for 21 century.


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