How Do You Measure Lumens?

Answer

Lumens is known as how bright a light is. There are a few ways to determine, or how to measure Lumens which include a device called integrating sphere. This device is normally pricy, but can be found in many electrical stores in the US and the UK.
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How to Measure Lumens
The lumen is the unit scientists use in the study of luminous flux from a given light source. Luminous flux is the amount of radiative energy passing a given point every second that the human eye can see. The National Institute of Standards and... More »
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Source: www.ehow.com
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