A light-emitting diode (LED) is a semiconductor device that emits light when an electric current flows through it
A switch responds to an external force to mechanically change an electric signal. Switches are used to turn electric circuits ON and OFF and to switch electric circuits
A wire is a flexible metallic conductor, especially one made of copper, usually insulated, and used to carry electric current in a circuit
A pendant light, sometimes called a drop or suspender, is a lone light fixture that hangs from the ceiling usually suspended by a cord, chain, or metal rod.
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