s of LCD and DLP projectors use a rating called Lumens to put a value on how bright their machine is. Without getting into all the technical explanations and assuming that all manufacturers use the same methods, this is a simple guide as to what brightness will work in what situations.

A few common truths about projecting no matter how bright your projector is.

    * The darker the room or situation the better your image will look
    * Using a true screen will give you significantly better results than a painted wall or other makeshift surface.
    * No matter how bright the projector, the sun will cut through  the image
    * Higher contrast graphics are easier to read when delivering text
    * The bigger the screen, the less apparent brightness you will have.


Low Lumen (Under 1000)
A projector under 1000 lumens should be used in controlled light situations. In situations where only text is going to be displayed, using high contrast graphics (black background, white text) you will be able to get away with some more light in a room, such as class rooms where students need to take notes while watching. Projectors in this range will not be high res and more than likely disappoint you if you are looking to set up a home theater. I would reserve these for instructional purposes.

Mid Lumen (1000 - 2500)
Projectors in this range will certainly be more forgiving as it relates to extraneous light. Still the darker the better, but these will be better for situations where you can not control light and need some light for instructional purposes. These projectors will fill many needs adequately and will generally be compact, portable and easy to set up.

Mid-High Lumen (2500 - 5000)
Projectors in this range are going to give you a good picture in about any interior space with the main lights off. Sunlight will still effect the picture, but a room with shades drawn will look good. These machines tend to be more on the professional side and may have special power requirements and may be a bit heavier than lower lumen units. Additionally set up may be a little more technical. Be sure to understand what you are buying.

High Lumen (Over 5000)
These projectors will work in about any situation and may be over kill for some. These machines will probably be professional and have special power requirements and may be a bit heavier than lower lumen units. Additionally set up may be a little more technical. Be sure to understand what you are buying.