Lightbulb

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Revision as of 17:10, 5 March 2008 by imported>Aleta Curry (March write-a-thon. No wonder Louise couldn't change one!)
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A lightbulb, also known as an incandescent lamp, is a glass bulb encasing a source of illumination.

The light is created by an electric current passing through through wire to a metal filament, creating heat and incandescence (bright light).

Experimentation with incandescent lamps began in the early 19th Century. Thomas Edison is credited with patenting an improved, commercially-viable lightbulb.