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Posted: 13 Jan 2012 09:15 PM PST A light-emitting diode or LED - is a semiconductor light source. LEDs are used as indicator lamps in many devices and are increasingly used for other lighting. Introduced as a practical electronic component in 1962, early LEDs emitted low-intensity red light, but modern versions are available across the visible, ultraviolet, and infrared wavelengths, with very high brightness. —————————————————————— Return To The Main Features Page —————————————————————— Source: Wikipedia Advertisement |
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