A lot of RPTVs come with highly reflective protective screens on them. We just got a 65" Toshiba (65H93) and the reflection off the water through the window was really annoying, so we re-stacked the screen layers so that the outermost one is the lenticular lens (the one with vertical grooves); It's much better now. I think they're [re]movable on most TVs if you're willing to get in there.