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  2. Glow switch starter - Wikipedia

    en.wikipedia.org/wiki/Glow_switch_starter

    Various types of glow starter. A glow switch starter or glowbottle starter is a type of preheat starter used with a fluorescent lamp. It is commonly filled with neon gas or argon gas and typically contains a bimetallic strip and a stationary electrode. The operating principle is simple, when current is applied, the gas inside ionizes and heats ...

  3. 3-way lamp - Wikipedia

    en.wikipedia.org/wiki/3-way_lamp

    A 3-way lamp, also known as a tri-light, is a lamp that uses a 3-way light bulb to produce three levels of light in a low-medium-high configuration. A 3-way lamp requires a 3-way bulb and socket, and a 3-way switch. In 3-way incandescent light bulbs, each of the filaments operates at full voltage. Lamp bulbs with dual carbon filaments were ...

  4. Multiway switching - Wikipedia

    en.wikipedia.org/wiki/Multiway_switching

    In building wiring, multiway switching is the interconnection of two or more electrical switches to control an electrical load from more than one location.A common application is in lighting, where it allows the control of lamps from multiple locations, for example in a hallway, stairwell, or large room.

  5. Three-point lighting - Wikipedia

    en.wikipedia.org/wiki/Three-point_lighting

    The addition of a fourth light, the background light, makes for a four-point lighting setup. The background light is placed behind the subject(s), on a high grid, or low to the ground. Unlike the other three lights, which illuminate foreground elements like actors and props, it illuminates background elements, such as walls or outdoor scenery.

  6. Motor soft starter - Wikipedia

    en.wikipedia.org/wiki/Motor_soft_starter

    A motor soft starter is a device used with AC electrical motors to temporarily reduce the load and torque in the powertrain and electric current surge of the motor during start-up. This reduces the mechanical stress on the motor and shaft, as well as the electrodynamic stresses on the attached power cables and electrical distribution network ...

  7. William Potts (inventor) - Wikipedia

    en.wikipedia.org/wiki/William_Potts_(inventor)

    William Potts (May 1883 – 1947) was a Detroit police officer who is credited with inventing the modern, three-lens traffic light in Detroit in 1920. (A gas-powered, two-lens, red/green traffic signal was invented in London in 1868 by John Peake Knight, though after a short test installation, traffic lights were not seen again in the U.K. until 1929.) [1]

  8. Philips Hue - Wikipedia

    en.wikipedia.org/wiki/Philips_Hue

    The Hue system was released in October 2012 on Apple Store, [3] and was marketed as the first iOS-controlled lighting appliance. [6] Products released before 2019 use the Zigbee Light Link protocol, a compatible subset of Zigbee 3.0, to communicate, while lighting products released later use either Bluetooth or Zigbee 3.0. Smart switches ...

  9. Fire piston - Wikipedia

    en.wikipedia.org/wiki/Fire_piston

    These two factors together mean that only a tiny amount of tinder can be lit by a fire piston, but this can be sufficient to light other tinder, and in turn to light a larger fire. Tinders that ignite at a very low temperature work best. Easily-combustible materials such as char cloth or amadou work well as tinder, and can also hold an ember ...