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2. Light switch - Wikipedia

   en.wikipedia.org/wiki/Light_switch

   Two light switches in one box. The switch on the right is a dimmer switch. The switch box is covered by a decorative plate. The first light switch employing "quick-break technology" was invented by John Henry Holmes in 1884 in the Shieldfield district of Newcastle upon Tyne. [1]

3. Switch - Wikipedia

   en.wikipedia.org/wiki/Switch

   A switch may be directly manipulated by a human as a control signal to a system, such as a computer keyboard button, or to control power flow in a circuit, such as a light switch. Automatically operated switches can be used to control the motions of machines, for example, to indicate that a garage door has reached its full open position or that ...

4. LED lamp - Wikipedia

   en.wikipedia.org/wiki/LED_lamp

   A 230-volt LED filament lamp, with an E27 base. The filaments are visible as the eight yellow vertical lines. An assortment of LED lamps commercially available in 2010: floodlight fixtures (left), reading light (center), household lamps (center right and bottom), and low-power accent light (right) applications An 80W Chips on board (COB) LED module from an industrial light luminaire, thermally ...

5. Light fixture - Wikipedia

   en.wikipedia.org/wiki/Light_fixture

   Surface-mounted light – the finished housing is exposed, not flush with the surface. Low-bay lighting with sphere outline. Chandelier – Branched ornamental light fixture designed to be mounted on ceilings; Pendant light – suspended from the ceiling with a chain or pipe. Sconce – provide up or down lights; can be used to illuminate ...

6. Flashlight - Wikipedia

   en.wikipedia.org/wiki/Flashlight

   A wide variety of mechanical switch designs using slide switches, rocker switches, or side-mounted or end-mounted pushbuttons has been used in flashlights. A common combination is a slide switch that allows the light to be left on for an extended time, combined with a momentary button for intermittent use or signalling.

7. Electromagnetic lock - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_lock

   The magnetic lock should always be installed on the secure side of the door. Most installations are surface mounted. For safety, magnetic lock, cables, and wires should be routed through the door frame or flush mount with wire moulding. Installation is straightforward.