| lumens |
Unit of light measurement typically for projectors.
출처: www.tvsaudiovisual.com/glossary.htm
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| lumens |
This is the total amount of light that a bulb is capable of generating. This information should be readily available, either on the bulb package or from manufacturer's data sheets. It may take some digging to find it though. There are two values usually quoted: initial lumens and design lumens. When a fluorescent bulb is first turned on, it will be about 20% brighter than it will be after some amount of burn-in, typically 100 hours. ...
출처: aquaticconcepts.thekrib.com/Lights/
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| lumens |
The light output from a lamp (bulb or tube) is expressed in lumens. A 100-watt incandescent bulb produces 1750 lumens; a 40-watt cool white fluorescent produces 3150 lumens. Lumens can be thought of as the measurement for the flow rate of light. The efficiency of light sources is measured by the amount of light emitted for each watt of power used, or lumens per watt. In the above example, a 100-watt incandescent has 17.5 lumens per watt while the 40-watt fluorescent has 78.75 lumens per watt.
출처: www.dazor.com/lighting-terminology.html
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