NOT KNOWN FACTS ABOUT WHY IS MY PROJECTOR SCREEN GETTING DIMMER

What does this signify? End users must improve the projector's placement if possible to attenuate the quantity of zoom required and keep brightness. So mount as close as feasible?The EH-TW7100 finishes over a superior with its audio. The constructed-in speaker process gives loads of volume and the mandatory selection to prevent Pacific Rim's loudes