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.
They are definitely the least bright projectors almost all with less than 100 lumens. They are limited in use, need a really dark room to do a good job on a small screen â say 40 inches, but are the ultimate in portability. Pocket projectors are the next size up, and like Pico Projectors tend to have LED light sources. These weigh from roughly 1 lb. to about 4 pounds and are mostly 300 â 700 lumens with the brightest hitting 1000 lumens (2015). These are becoming more and more practical each year.