Lamp (electrical component)

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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, two metal caps or a bayonet cap. Re-lamping is the replacement of only the removable lamp in a light fixture.

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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