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A lamp, in technical usage, is a replaceable component such as an incandescent light bulb, which is designed to produce light from electricity. These components usually have a ceramic or metal base, which makes an electrical connection in the socket of a light fixture. This connection may be made with a threaded base, two metal pins, or a "bayonet mount."

Timeline of lighting technology

Quoted: The new high efficiency incandescent (HEI™) lamp, which incorporates innovative new materials ... would replace traditional 40- to 100-Watt household incandescent light bulbs, the most ...