I saw the add for the new microporjector at 3M.com. I am interested in it but have a ?. How bright is it? I teach 3rd grade and am using a traditional LCD Projector, but this would take up less space and make less noice. Does is show well in a lit room? Or does it need to be dark? In the ad, I see only small (10-12in) pics but I know it can go up to 50!