Roughly 4000 lumens suits a mid sized room where the lights can be dimmed but not blacked out, such as a meeting room, a tutorial room or a small hall. The Epson models here run from standard throw units like the EB-2247U and EB-L260F to ultra short throw and interactive versions such as the PowerLite 770F and BrightLink 760Wi, which mount close to the screen. Measure the throw distance first, then pick WXGA or Full HD.
