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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 .
The international lamp coding system (ILCOS) is defined by IEC 61231, [1] an international standard maintained by the lamp technical committee of the International Electrotechnical Commission. It is intended to provide a well-defined and vendor-independent coding system for all lamp categories except vehicle lamps. The first version of the ...
Ott believed that the proprietary lighting technology he developed was the closest replication of the Sun's natural wavelengths. He developed several consumer products based on this technology, including altered lightbulbs and a special pair of polarized sunglasses which he believed would enhance the physical and mental fortitude of anyone wearing them.
It can be incorporated into an existing fluorescent light fixture or mounted remotely outside of it. When power is lost, the ballast will illuminate one or more lamps in the fixture at a reduced output for a minimum of 90 minutes (as required by code). These can be used as an alternative to egress lighting powered by a back-up electrical generator.
Mobile phones have a fixed identification code, the IMEI. A telephone reported stolen can have its IMEI blocked by networks , preventing them from being used as mobile devices. [ 11 ] iOS offers a similar "Activation Lock" feature via the " Find My iPhone " security software, where a device can be remotely prevented from operating (even after ...
Electric Autolite was founded. The company produced a generator to power early day auto lamps. Original equipment customers: Studebaker, Packard, and Indiana Buggy Works. [2] 1927: Electric Autolite acquires Prest-O-Lite Battery Company from The Union Carbide Corporation which produced automotive batteries. Electric Autolite's products were ...
In a television studio, a tally light (or on air indicator) is a small signal lamp on a professional video camera or monitor. It is usually located just above the lens or on the electronic viewfinder (EVF) and communicates, for the benefit of those in front of the camera as well as the camera operator , that the camera is live (i.e. its signal ...
These versions of the 5-15R or 5-20R receptacle are residual-current devices, and have "Test" and "Reset" buttons (and sometimes an indicator light which may be normally on or normally off per the vendor's design). In the US and Canada, GFCI protection is required for receptacles in many potentially wet locations, including outside outlets ...