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  2. Emergency light - Wikipedia

    en.wikipedia.org/wiki/Emergency_light

    An emergency light is a battery-backed lighting device that switches on automatically when a building experiences a power outage. In the United States, emergency lights are standard in new commercial and high occupancy residential buildings, such as college dormitories, apartments, and hotels.

  3. Emergency power system - Wikipedia

    en.wikipedia.org/wiki/Emergency_power_system

    A backup generator for a large apartment building A backup power fuel cell for telecom applications A portable emergency power generator in a shipping container. An emergency power system is an independent source of electrical power that supports important electrical systems on loss of normal power supply.

  4. Recessed light - Wikipedia

    en.wikipedia.org/wiki/Recessed_light

    When installed it appears to have light shining from a hole in the ceiling, concentrating the light in a downward direction as a broad floodlight or narrow spotlight. Different types of recessed lighting in a warehouse "Pot light" or "canister light" implies the hole is circular and the lighting fixture is cylindrical, like a pot or canister.

  5. Bathroom emergency pullstring - Wikipedia

    en.wikipedia.org/wiki/Bathroom_emergency_pullstring

    These pull cords are part of a communication system where, when pulled, a light outside the bathroom flashes, which notifies a nurse or someone who is around to help the person in need. In addition to the flashing light, a buzzer or tone can be heard. Ideally, they are placed near the toilet or shower. [2]

  6. Avro Vulcan - Wikipedia

    en.wikipedia.org/wiki/Avro_Vulcan

    Distinctive gloss finish with light grey underside. [56] K.2 Six B.2s converted for air-to-air refuelling with Mark 17 hose drum unit (HDU) mounted semi-recessed in the tail cone. TFR deleted. Fitted with three bomb-bay drum tanks, it was the only mark of Vulcan that could jettison fuel in an emergency. [199] B.3

  7. Blue light station - Wikipedia

    en.wikipedia.org/wiki/Blue_Light_Station

    This emergency trip system (ETS) immediately shuts down the traction power supply in the adjacent track section, to protect people already on or about to enter the track from the dangers of electric current. Requirements of Blue Light Stations are defined in the NFPA standard 130, "Standard for Fixed Guideway Transit and Passenger Rail Systems ...