| lumens |
Lumens, also called Luminous Intensity, represents the total amount of photons emitted by a light source at any given time. Lumens is not the same as brightness, which is the maximum concentration of photons on a given location. Lumens is non-directional (unlike Candelas). (Summing this up over a surface gives total flux, but a point source has no area so you can't really calculate its intensity.)
출처: www.deltagear.us/Glossary.htm
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| lumens |
Unit of light measurement typically for projectors.
출처: www.tvsaudiovisual.com/glossary.htm
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| lumen |
The unit of measure for the light energy which flows in air. The total light output from electric sources is expressed in lumens. A uniform source of one candlepower placed in a sphere emits 12.57 lumens or mean spherical candela equals to 12.57 lumens.
출처: www.energy.state.or.us/bus/light/glossary.htm
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| lumen |
a unit of measurement quantifying the amount of light emitted from a light source.
출처: www.etaengineering.com/resources/glossary.shtml
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| lumen |
It is a measurement of illumination on a screen or other surface. 1 Lumen/m2 = 1 Foot-candle.
출처: www.coleprojectors.com/glossary.shtml
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