Music video by Justin Bieber performing Never Let You Go. (C) 2010 The Island Def Jam Music Group. #VEVOCertified on November 9, 2010. http://www.youtube.com/vevocertified.
Lumens are a unit of measurement of the total brightness that comes from a light source, in this case, a projector. One may also see the term ANSI Lumens. ANSI is an acronym for the American National Standards Institute. In general, the more lumens a projector has, the brighter the image on the screen.
Lumen is a unit of light, which is also known as Luminous flux. Lumens (LM) are a measurement unit, which tells what the total amount of light emitted from a flashlight or headlamp. You can roughly say that the more Lumens the brighter the light. When we test and compare our products, we use Lumens to see the total amount of light output.