In building wiring, a light switch is a switch, most commonly used to operate electric lights, permanently connected equipment, or electrical outlets. Portable lamps such as table lamps will have a light switch mounted on the socket, base, or in-line with the cord. Manually operated on/off switches may be substituted by remote control switches, or light dimmers that allow controlling the brightness of lamps as well as turning them on or off.
Light switches are also found in flashlights and automobiles and other vehicles.
Read more about Light Switch: Wall-mounted Switches, History and Culture, Design, Multiway Switching
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