Electric light

An electric light, lamp, or light bulb is an electrical device that produces light from electricity. It is the most common form of artificial lighting. Lamps usually have a base made of ceramic, metal, glass, or plastic that secures them in the socket of a light fixture.

The electrical connection to the socket may be made with a screw-thread base, two metal pins, two metal caps or a bayonet mount.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY-SA 4.0

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