Science Source December 28, 2009 DVD
EN_00957730_1038
LED floodlight. A light-emitting diode (LED) is based on a forward-biased semiconductor heterojunction. Recently-developed high-power white LEDs are beginning to be used for lighting and illumination applications (called solid-state lighting). Compared to conventional incandescent light bulbs, LEDs are much more efficient, durable, and have longer lifetime. Solid-state lighting is expected to eventually replace conventional incandescent and even fluorescent light bulbs. Shown here is a floodlight that produces 600 lumens of light from 16 W of electrical power and has a lifetime of 25000 hours. It is sold in the USA by Philips.
2011-03-20
EAST NEWS
Science Source
GIPhotoStock
bp0660
0,63MB
38cm x 25cm przy 300dpi
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