#3 How do I make my Optoma projector brighter?
Increasing Lumen Output
Clean your projector's lens. ...
Vacuum your projector's air intakes and exhaust ports, or, if has a removable air cleaner, remove it and clean it. ...
Turn up your projector's lamp level. ...
Put your projector in its brightest output mode. ...
Replace a projector bulb that is nearing the end of its life.