For a normal-sized conference room with dim light, look for at least 500 to 1,000 lumens. Large conference rooms with normal lighting require at least 1,000 to 1,500 lumens of brightness. And if you give monster presentations in auditoriums, you'll need 1,500 lumens or more, regardless of lighting conditions. 3M recommends purchasing the highest lumen rating you can afford because brighter images make presentations look better. This is the ratio of white to black for a particular spot on an image.
Higher ratios mean more contrast and crisper images.
You don't want a noisy projector drowning out the sound of either your voice or the presentation, so pay attention the noise level of the machine. The quietest projector currently available features 32 dB of noise. Most projector manufacturers make this easy for you by offering online tools to help you choose the right model. The tools will immediately show you which projectors match your usage profile. For a more personal touch, contact your Boise sales rep to discuss which projectors fit your varying business needs.