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2. Balanced-arm lamp - Wikipedia

   en.wikipedia.org/wiki/Balanced-arm_lamp

   Springs can be located on the mechanical equivalent of the forearm or the upper arm, or both, as well as nearer to the base. Some lamps use tension springs, and others use compression springs. The adjacent image shows (left to right) a compression spring at rest, then under load, followed by a tension spring at rest, and then under load.

3. Upholstery coil springs - Wikipedia

   en.wikipedia.org/wiki/Upholstery_Coil_Springs

   Prior to the early 1900s, springs were used as bed bases or box springs; these spring sets were not covered with fabrics. There were no "innerspring" mattresses manufactured until after 1900. Bushnell's patent has been cited [ 26 ] as an innerspring but it was an under bed spring--which in the mid-1800s was also called a mattress or base layer ...

4. Lightbulb socket - Wikipedia

   en.wikipedia.org/wiki/Lightbulb_socket

   A lightbulb socket, lightbulb holder, light socket, lamp socket or lamp holder is a device which mechanically supports and provides electrical connections for a compatible electric lamp base. [1] Sockets allow lamps to be safely and conveniently replaced (re-lamping).

5. Box-spring - Wikipedia

   en.wikipedia.org/wiki/Box-spring

   Box-spring Queen size box-spring on metal bed frame 8-way hand-tied box spring. A box-spring (or divan in some countries) is a type of bed base typically consisting of a sturdy wooden frame covered in cloth and containing springs. Usually, the box-spring is placed on top of a wooden or metal bedframe that sits on the floor and acts as a brace ...

6. Sconce (light fixture) - Wikipedia

   en.wikipedia.org/wiki/Sconce_(light_fixture)

   A sconce or wall light is a decorative light fixture that is mounted to a wall. [1] The sconce is a very old form of fixture, historically used with candles and oil lamps . They can provide general room lighting, and are common in hallways and corridors, but they may be mostly decorative. [ 1 ]

7. High-mast lighting - Wikipedia

   en.wikipedia.org/wiki/High-mast_lighting

   A high mast light in Toronto High-mast lighting tower in a stadium A six-lamp configuration on a mast High-mast lighting used on Ontario Highway 401 at night High-mast lighting used on Ontario Highway 401 during the day High-mast lights in conjunction with shorter lampposts at the Tainan System Interchange (Chinese: 台南系統交流道) in Sinshih District, Tainan, Taiwan A light tower on ...

8. Light fixture - Wikipedia

   en.wikipedia.org/wiki/Light_fixture

   Under-cabinet light – mounted below kitchen wall cabinets. Display Case or Showcase light – shows merchandise on display within an enclosed case such as jewelry, grocery stores, and chain stores. Ceiling fan – may sometimes have a light, often referred to as a light kit mounted to it. Ceiling fans with built-in lights may eliminate the ...

9. Plug-in box (stage lighting) - Wikipedia

   en.wikipedia.org/wiki/Plug-in_box_(stage_lighting)

   Moving heads connected to a plug-in box (center). In stage lighting, a plug-in box, plug box [1] or drop box [2] is a device, similar to a power strip, to distribute power to multiple lighting instruments, consisting of an inlet (either detachable or hard-wired), and multiple female outlet connectors or pigtails.