Incandescent Light Bulb

An electric light which produces light with a wire filament heated to a high temperature by an electric current passing through it, until it glows.

Nicknames
Incandescent Lamp, Incandescent Light Globe, Light Bulb
Announcement / Release
January 1802
Birth Place
London, England, United Kingdom of Great Britain and Northern Ireland

About

An incandescent light bulb, incandescent lamp or incandescent light globe is an electric light which produces light with a wire filament heated to a high temperature by an electric current passing through it, until it glows (see Incandescence). The hot filament is protected from oxidation with a glass or quartz bulb that is filled with inert gas or evacuated. In a halogen lamp, filament evaporation is prevented by a chemical process that redeposits metal vapor onto the filament, extending its life. The light bulb is supplied with electrical current by feed-through terminals or wires embedded in the glass. Most bulbs are used in a socket which provides mechanical support and electrical connections.

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