what is lumens in projector

Lumens are the measurement of brightness that a projector gives out, with the formal term being "ANSI lumens." ANSI stands for American National Standards Institute. The brightness specification is an important reference point when selecting a projector, and it is typically expressed in lumens or ANSI lumens. The amount of brightness needed depends on the room in which the projector will be used. For home theater projectors where ambient light is kept to a minimum, a minimum of 1500 lumens is needed, while for classrooms, conference rooms, or rooms with windows, a minimum of 2500 lumens is best. For large auditoriums or lecture halls, more lumens are needed. Lumens vs ANSI Lumens: Lumens tell you the brightness the projector’s lamp is able to produce, while ANSI Lumens are a unit that measures the overall amount of light delivered by a projector