Summary: Cons 50 Lumens? 50?? To put that in perspective, a typical LCD projector is 1500 lumens and big ones are 2500+. Of course those are pushing a much larger image as well. But even at computer monitor size - 50 Lumens is a flashlight - this thing barely shows a 3' diagaonal image in a room with _any_ ambient light. You will literally have to do your presentation in the dark.