NEC NP-PX750U 7500 lumen Widescreen Professional Installation ProjectorThe NEC NP PX750U 7500 Lumen Widescreen Professional Projector is one of NEC's stackable projectors. No, you don't stack them on top of each other. You can place up to four of them side by side in a row to project one luminously bright and perfectly aligned image. With four NP PX750Us that's an image. That's an incredible 30,000 Lumens bright. It's ideal for larger sized screens. This feature also prevents the complete loss of an image, which can