I am using 'Calibrated Dark' mode. Even in this mode I have backlight set to 15. For complete dark room/at night I keep full array to low and for daytime watching I switch it to medium. If calibrated dark mode is too dark for you, increase backlight to between 15 - 25 and should be good. I am feeding power through balanced isolated transformer to provide cleanest power. If you are into it, you can find it at amazon, search 'umi'.Which picture mode are you using? Calibrated? Calibrated dark?