Brightness is measured in lumens. The lumens can range anywhere from 300 lumens to 3300 lumens, with 3300 being the brightest. Lumen Range Comments 300 - 500 lumens These will usually be the least expensive projectors. Also, the low light output may require your presentations to be made in a dark or dimly lit room. 500 - 1000 lumens Projectors in this range are geared toward normal business conference room and classroom use. You may have to reduce lighting a little, but a totally dark or dimly lit room is not necessary. 1000 - 1500 lumens Aimed at large conference rooms and classrooms, these machines project a bright image even with lights on. 1500 - lumens and up These projectors are used for nightclubs, concert halls, auditoriums, churches and other large venues. With this information in mind, there are some things to consider when choosing your brightness. the Light in the Room No matter the brightness of your projector is, a dark room will always provide the best image. However, many situations require some light for note taking and communication. If a room''s lighting cannot be controlled, a bright projector will be needed.

Your Application If you are giving a training presentation, you will probably need a brighter projector so the participants can read detail and take notes. A presentation using graphics and/or video will be visually less demanding and can be viewed in a darkened room. Your Screen Sufficient light reflection is provided in most screens on the market, thus making a low brightness projector look good in the right setting. The Number of People The image size increases as the number of people in the room increases. This reduces the brightness of the projector since the light is spread over a larger area. Another important thing to think about when buying a projector is the weight of the unit. If you travel quite a bit, you may want a very light weight unit. If you do not travel and want more features on the projector, you may opt for a heavier model. The Four weight classes of projector are as follows: Ultra-Mobile Ideal for the Traveling presenter. Typically weighing under 8 lbs, these machines provide a great low-weight-to-brightness ratio while maintaining the desired data resolution and video output. On the down side, some of the lightweight projectors sacrifice features such as power zoom, power focus, and remote control capabilities which can weigh the projector down.

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