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  2. Annunciator panel - Wikipedia

    en.wikipedia.org/wiki/Annunciator_panel

    In large buildings, a fire alarm control panel is located in a secure location, such as in an electrical room where it is also convenient for running electrical wires for system components or in a fire command center. A fire alarm annunciator panel is located where it is accessible to fire-fighting crews, such as at building entrances/exits.

  3. Lighting control console - Wikipedia

    en.wikipedia.org/wiki/Lighting_control_console

    A lighting control console (also called a lightboard, lighting board, or lighting desk) is an electronic device used in theatrical lighting design to control multiple stage lights at once. They are used throughout the entertainment industry and are normally placed at the front of house (FOH) position or in a control booth .

  4. Pilot-controlled lighting - Wikipedia

    en.wikipedia.org/wiki/Pilot-controlled_lighting

    Pilot-controlled lighting (PCL), also known as aircraft radio control of aerodrome lighting (ARCAL) or pilot-activated lighting (PAL), is a system that allows aircraft pilots to control the lighting of an airport or airfield's approach lights, runway edge lights, and taxiways via radio.

  5. Lighting control system - Wikipedia

    en.wikipedia.org/wiki/Lighting_control_system

    The benefit of architectural lighting control systems in the theater is the ability for theater staff to turn worklights and house lights on and off without having to use a lighting control console. Alternately, the light designer can control these same lights with light cues from the lighting control console so that, for instance, the ...

  6. Reset (computing) - Wikipedia

    en.wikipedia.org/wiki/Reset_(computing)

    [3] [4] Devices may not have a dedicated Reset button, but have the user hold the power button to cut power, which the user can then turn the computer back on. [5] Out-of-band management also frequently provides the possibility to reset the remote system in this way.

  7. Light switch - Wikipedia

    en.wikipedia.org/wiki/Light_switch

    Pushing the raised button opens or closes the contacts and pops out the previously depressed button so the process can be reversed. In the U.S., the buttons were commonly black; the "on" button typically had a white mother-of-pearl (real or simulated) inlay to indicate its function. By convention, the switch was customarily installed with the ...

  8. Carbon button lamp - Wikipedia

    en.wikipedia.org/wiki/Carbon_button_lamp

    The carbon button lamp is a single-electrode incandescent lamp invented by Nikola Tesla in the 1890s. [1] A carbon button lamp contains a small carbon sphere positioned in the center of an evacuated glass bulb.

  9. Three Mile Island accident - Wikipedia

    en.wikipedia.org/wiki/Three_Mile_Island_accident

    A light on a control panel, installed after the PORV had stuck open during startup testing, [37] came on when the PORV opened. [38] When that light—labeled Light on – RC-RV2 open [ 39 ] —went out, the operators believed that the valve was closed.