How Bright Should My Classroom Projector Be?

It’s back to school time here at Projector People!

Today’s lesson is on classroom projector brightness. How bright a projector do you need for your classroom? Will 3,000 lumens do the trick? What about 5,000?

It all depends on the lighting conditions.

Read on to learn how many lumens you need based on you classroom’s ambient light.

Key

Low ambient light* Controlled Lighting: If you plan to use your projector in a room where there are no windows, such as a basement, or if you use your projector primarily at night, any of today’s projectors will provide a bright image.

Low ambient light Low ambient light: Little to no light entering room.

Some ambient light Some ambient light: Some additional light in room. Slightly dimmed, window blinds leaking some light.

High ambient light Bright ambient light: Windows open during daylight hours, lights that cannot be dimmed like in an open office settings. Bright enough for audience note taking.


Education – 4:3 Screen

Screen Size 72″ (43″ x 57″) 100″ (60″ x 80″) 120″ (72″ x 96″) 150″ (87″ x 116″)
2500 lumens Low ambient light Low ambient light Low ambient light Low ambient light
2700 lumens Low ambient light Low ambient light Some ambient light Some ambient light
3000 lumens Some ambient light Some ambient light Some ambient light Some ambient light
3500 lumens Some ambient light Some ambient light Some ambient light Some ambient light
4000 lumens Some ambient light Some ambient light Some ambient light Some ambient light
4500 lumens Not recommended Some ambient light Some ambient light Some ambient light
5000 lumens Not recommended Not recommended High ambient light High ambient light
5500 lumens Not recommended Not recommended High ambient light High ambient light
6000 lumens Not recommended Not recommended High ambient light High ambient light