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2. Light fixture - Wikipedia

   en.wikipedia.org/wiki/Light_fixture

   Permanent light fixtures, such as dining room chandeliers, may have no switch on the fixture itself, but rely on a wall switch. Fixtures require an electrical connection to a power source, typically AC mains power, but some run on battery power for camping or emergency lights. Permanent lighting fixtures are directly wired.

3. Nickel–iron battery - Wikipedia

   en.wikipedia.org/wiki/Nickel–iron_battery

   A 50 volt nickel–iron battery was the main D.C. power supply in the World War II German V-2 rocket, together with two 16 volt batteries which powered the four gyroscopes (turbine powered generators supplied A.C. for its magnetic amplifier driven servomechanisms). A smaller version was used in the V-1 flying bomb.

4. Lighting control system - Wikipedia

   en.wikipedia.org/wiki/Lighting_control_system

   In this kind of lighting systems the internal damages, for example battery overcharging, damaged lamps and starting circuit failure must be detected and repaired by specialist workers. For this reason, the smart lighting prototype can check its functional state every fourteen days and dump the result into a LED display.

5. Electric light - Wikipedia

   en.wikipedia.org/wiki/Electric_light

   An electric light, lamp, or light bulb is an electrical component that produces light. It is the most common form of artificial lighting . Lamps usually have a base made of ceramic , metal, glass, or plastic which secures the lamp in the socket of a light fixture , which is often called a "lamp" as well.

6. Comparison of commercial battery types - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_commercial...

   Nickel–zinc: 100 to 50% capacity [13] Nickel–iron: 65–80 5,000 Nickel–cadmium: 70–90 500 [25] Nickel–hydrogen: 85 20,000 [31] Nickel–metal hydride: 66 300–800 [13] Low self-discharge nickel–metal hydride battery: 500–1,500 [13] Lithium cobalt oxide: 90 500–1,000 Lithium–titanate: 85–90 6,000–10,000 to 90% capacity ...

7. Sconce (light fixture) - Wikipedia

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

   The light of the candle flame was often intensified by a reflecting backplate. Using brackets, the candle or gas flame would be kept at safe distance from the wall and ceiling. [3] Modern electric light fixture sconces are often used in hallways or corridors to provide both lighting and a point of interest in a long passage. Sconce height in a ...