Hi - I'm new to the forum. I have owned an inflatable rental company for the past 10 years (moonwalks/bouncy castles/slides etc) and just recently purchased my first inflatable movie screen. It's 12 ft diagonal with a 16:9 ratio and came with two 80 watt powered speakers but I need to purchase a projector. My plan is to rent this out for backyard movie nights as this seems to be a growing market in my area. I've been reaseaching projectors and was hoping that someone may have some good advise to offer me regarding making a wise business decision. The projector will most likely be showing DVD movies or perhaps an occasional sporting event. I was thinking that I would go with 1280 x 720 resoultion projector so the picture quality would be very good. Problem is most people are telling me that I will need at least 4000 lumens. 1280 x 720 DLP or LCD projectors seem to max out at about 2000-2500 lumes. Will this be too dim or dark on this 12 foot screen? If I go with a high lumen XGA projector will I suffer in picture quality and woun't the image be scaled and not fill up my entire screen? It's backyard theater but I would like to still be able to offer a high quality picture to my customers. Anyone have any thoughts, experience or words of wisdom here ???