Fry-
First it will depend on the lumens (brightness) rating of your projector. CRT's normally have much lower lumens ratings than digital (LCD, DLP, D-ILA) projectors. Depending on your budget, room configuration and setup, you should have no problem getting a digital projector that has enough output to work in the surrounding your describing.
If there aren't any lights directly on the screen area, or near the projector you should be OK in most cases. Assuming the room isn't bathed in bright sunlight.
Also, to further detail what Larry said, changing the brightness setting on a digital projector does nothing to effect bulb life. The bulb still "burns" at the same intensity. The brighness setting isn't like a dimmer switch on a lamp, meaning it's not actually dimming the bulb. Actually, brighness sets black level, and contrast sets white level, but that's a whole other discussion!
With that said, be aware that many of digital projectors that are designed for home theaters DO have a setting that reduces bulb brightness and extends bulb life. These setttings are called things like Theater mode, or Cinema Black, etc. When projectors so equipped are run in this mode, the projected image has less overall brighness because the bulb is putting out less lumens. Most manufacturers claim about twice the bulb life in the theater mode.
If you have any more questions, take a look at the projector forums at
www.avsforum.com. You'll learn more than you ever wanted to know! :)
Also, you can check out my projector equipped theater at
www.thecitycinema.comThis message was edited by Steve13 on 10/28/01 06:52.57.