46+ Lumens. Lm) is the si derived unit of luminous flux, a measure of the total quantity of visible light emitted by a source per unit of time. This is the official lumens high performance lighting (lumens hpl) online store.
Lumen Unit Wikipedia from upload.wikimedia.org
Because lumens measure brightness and watts measure energy output, there is no simple method for converting wattage to. Lumens.com has a consumer rating of 1.57 stars from 41 reviews indicating lumens.com also ranks 115th among lighting sites. Energy saving lamps have high luminous efficacy (more the power p in watts (w) is equal to the luminous flux φv in lumens (lm), divided by the luminous efficacy.
You'll be using ansi lumens to express how bright the image of a projector will be as a result of the output of the lamp inside that projector.
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