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The proper name for Lumen is ANSI Lumen, but in informal communication nad most formal communication it has been shortened to simply 'Lumen'.

The American National Standards Institution Lumen has been adopted world-wide. It is a standard measure of brightness in display systems. Lumens define luminous flux, a physics term for energy within the range of frequencies of visible light. For example, a wax candle generates 13 ANSI lumens; a 100 watt bulb generates 1,200 ANSI lumens.

A small room typically requires from 200 to 300 ANSI lumens, whereas a large room may require from 400 to 600. A large auditorium may need 2000 or more.

See Also: Ambient Light, Brightness, Linked Constant Light Output

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Related Dictionary Entries for Lumen:

ANSI Lumen


Linked Constant Light Output



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