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  2. Emergency light - Wikipedia

    en.wikipedia.org/wiki/Emergency_light

    A hallway under regular lighting (left) and emergency lighting (right) US-style emergency lighting fixture An emergency light is a battery-backed lighting device that switches on automatically when a building experiences a power outage.

  3. Exit sign - Wikipedia

    en.wikipedia.org/wiki/Exit_sign

    An exit sign is constantly lit; fluorescent bulbs need to be changed more often than LEDs, although the absence of frequent on/off cycles extends the life of fluorescent lamps significantly. Generally, LEDs have a very long life, and may last for 10 years or more of continuous use, although their brightness may gradually diminish.

  4. Tritium radioluminescence - Wikipedia

    en.wikipedia.org/wiki/Tritium_radioluminescence

    As tritium illumination requires no electrical energy, it has found wide use in applications such as emergency exit signs, illumination of wristwatches, and portable yet very reliable sources of low intensity light which won't degrade human night vision. Gun sights for night use and small lights (which need to be more reliable than battery ...

  5. Talk:Exit sign - Wikipedia

    en.wikipedia.org/wiki/Talk:Exit_sign

    One very important standard is part 1 of the IEC 60598, which specifies general requirement for luminaires incorporating electric light sources for operation from supply voltage up to 1000V. Section 22 of Part 2 (IEC60598-2.22) which is an additonal standard to part 1, specifiy requirements especially for emergency lighting including exit signs.

  6. Fluorescent lamp - Wikipedia

    en.wikipedia.org/wiki/Fluorescent_lamp

    A cold-cathode fluorescent lamp from an emergency-exit sign. Operating at a much higher voltage than other fluorescents, the lamp produces a low-amperage glow discharge rather than an arc, similar to a neon light. Without direct connection to line voltage, current is limited by the transformer alone, negating the need for a ballast.

  7. Light-emitting diode - Wikipedia

    en.wikipedia.org/wiki/Light-emitting_diode

    One-color light is well suited for traffic lights and signals, exit signs, emergency vehicle lighting, ships' navigation lights, and LED-based Christmas lights. Because of their long life, fast switching times, and visibility in broad daylight due to their high output and focus, LEDs have been used in automotive brake lights and turn signals.

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