Lamp (electrical component)
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For devices such as table lamps and reading lamps, see Light fixture.
A lamp is a replaceable component such as an incandescent light bulb, which is designed to produce light from electricity. These components usually have a base of ceramic, metal, glass or plastic, which makes an electrical connection in the socket of a light fixture. This connection may be made with a screw-thread base, two metal pins, 2 metal caps or a bayonet cap. Re-lamping is the replacement of only the removable lamp in a light fixture.
[edit] Lamps in electronics
Filament lamps have long been used as fast acting thermistors in electronic circuits. Popular uses have included:
- Stabilisation of sine wave oscillators
- Protection of tweeters
- Automatic volume control in telephones
[edit] Lamp circuit symbols
In circuit diagrams lamps usually are shown as symbols. There are two main types of symbols, these are:
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