as far as I know, BOTH are true.
lowering cell light is bad because it increases ABL...
lowering contrast is bad because it shifts the 10pt color calibration...
I decided to turn eco mode to low, does the trick for me. but I'm willing to bet that there's also a reason why one should never do this... it really feels like that's is no good way to adjust the peak brightness of a Samsung plasma??
Displays: Samsung PN64F8500/JVC X35
AVR: Pioneer VSX-1018AH, 5.1 audio
Sources: HTPC(Mediabrowser), PS3, XBOX360, Wii, Sony DVP-CX995V
Control: Harmony One