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.
Definition of projector. 1  1 : one that plans a project; specifically : promoter. 2  2 : one that projects: such asa : a device for projecting a beam of lightb : an optical instrument for projecting an image upon a surfacec : a machine for projecting motion pictures on a screen. 3 : an imagined line from an object to a surface along which projection takes place.