Emergency light
Backup light source used in power outages / From Wikipedia, the free encyclopedia
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Not to be confused with Emergency vehicle lighting.
An emergency light is a battery-backed lighting device that switches on automatically when a building experiences a power outage.
The examples and perspective in this article deal primarily with the United States and do not represent a worldwide view of the subject. (December 2010) |
In the United States, emergency lights are standard in new commercial and high occupancy residential buildings, such as college dormitories, apartments, and hotels. Most building codes in the US require that they be installed in older buildings as well. Incandescent light bulbs were originally used in emergency lights, before fluorescent lights and later light-emitting diodes (LEDs) superseded them in the 21st century.