.Not bad, in terms of performance vs. claim, the P1 Jr. measured just a touch below 9 lumens, while they claimed 10. Only the Optoma PK301 actually beat its claim, so that's pretty good. That considered, it's still 9 lumens. Yes, you can have a vibrant 20 inch image in a dark room, or even go larger, to perhaps 40 inches and still find it watchable, but, 9 is a very personal number of lumens - you and a friend viewing photos or video, or maybe that movie Road Trip, up to maybe 24 inches wide, if you plan to watch the whole thing. You can go larger, with less fatigue, for very short viewing, of course.