Things We Should Know Before Buying LEDs

Published:2011/6/23 3:26:00 Author:Phyllis From:SeekIC

Light Emitting Diodes or LEDs, are different from traditional lights sources in the way they produce light. The working principle of incandescent bulbs is to heat a tungsten filament until it glows or emits light. The fluorescent lamp emits ultraviolet (UV) radiation through exciting mercury atoms by an electric arc excites, striking the internal phosphor coating of the glass tubes, and the UV radiation will converted into visible light. LEDs are referred to as solid state devices because they are made from semiconductor materials and relies on indium gallium nitride to convert electricity into photons with direct current but not alternating current. An LED is usually a small area source which depends on the composition and condition of the semiconducting material used, and can be infrared, visible, or near-ultraviolet with extra optics added to the chip that shapes its radiation pattern. The specific wavelength or color emitted depends on the materials used to make the diode.

The red are based on aluminum gallium arsenide, blue are made from indium gallium nitride and green from aluminum gallium phosphide. White lights are created by combing the light from red, green, and blue or by coating a blue with yellow phosphor. LED based lights are still under development but it is predicted it will radically change the energy consumption patterns of the world over the next few years. The United States has committed an uncharacteristically large amount of industrial policy support for LED research and development. Asia is a hotbed of cutting-edge manufacturing technology and Europe and Canada have led the way in energy efficient initiatives accompanied by some of the most innovative design styles you can find anywhere.

LED lights were initially used in commercial environments like entertainment shows, theatres etc. Also, they already have become the best light source for traffic signals, vehicular tail lights, emergency lighting and flashlights. Home LED lightings such as accent wall LED lights, task, landscape and even outdoor LED lighting such as garden pole LED lightings have arrived in the market increasingly nowadays. Price is a hard thing to remain constant since most companies post retail type prices online and are willing to accept your bargain call for bulk purchases. The related model is LN66F.

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