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.
Projectors come in a wide range of light outputs, which are measured in ANSI lumens or just lumens for short. The brighter the projector, the higher the ANSI lumen rating, and (all else being equal) the more it costs.n today's market, projectors can be grouped by ANSI lumen output as follows: 1  Less than 2000 lumens. 2  Typically small and highly portable, these are the lowest light output projectors available today, and they are typically the least expensive.