Originally Posted by StinDaWg
This is the reason why I don't use eco mode (I have a 60F5300). On low it doesn't dim full white screens at all (like web pages) which is blinding in the dark, and also causes the set to buzz louder. Instead, I turned off eco, set cell light to 20 and lowered contrast to 80. This brings the brightness of whites down to an even level in all scenes, yet is still plenty bright even in a dark room.
Cell light works the same way. With contrast set at 95 you need to bring it down to about 7 or 8 before it even starts dimming full white screens, which then makes mixed content scenes in video look too dim.
yeah I've heard you're supposed to use contrast to adjust the peak brightness on plasma. but in practice, that seemed to be the easiest way to ruin the picture on the f8500. lowering the contrast f'd with the greyscale, made the image look flat(very little contrast), and still didn't seem to really fix the issue of 'average' content looking too bright.
I thought cell light worked the same way as backlight, and was the correct way to adjust panel brightness. but found out it's really just a way of adjusting ABL, not panel brightness.
and now I'm seeing that eco mode has it's own issues too.
there just doesn't seem to be a way to adjust panel brightness. every setting either affects the top end, or the bottom end more. ie, turning on eco doesn't dim the peak brightness at all, it just dims the low/medium APL scenes. lowering contrast, for some reason, seems to dim the high APL stuff, but not the low APL scenes, resulting in a terrible contrast ratio.
maybe the solution is just a lot more difficult than I want it to be. lower the contrast, and then adjust the gamma, and greyscale to compensate for the side effects of that lower contrast. pretty annoying if you ask me. maybe i'll continue experimenting, but I'm pretty content with eco on low right now. and I never saw a problem with using a cell light of 10 either. I only changed that because I read it was 'wrong', haha