Standard mode is too dim when running the slides and kinda defeats the purpose of them. When using Evengelo's "break-in" slides, you want the panel to be fairly bright, not dim. Dim is more for when aging the panel by watching regular content, not for when running the slides, and you'd have to age the panel for 2-3 times longer at dim settings before the phosphors have fully settled in. I equate slideshow aging to searing a rib-eye steak - i grill it hot and fast to seal in the juices and give it a nice crust and it comes out much tastier and juicier than when grilling it with low flame for longer duration. And the energy savings in Standard are negligeable anyway - maybe a dollar's worth if that.
D-Nice's 2012 panel aging slideshow procedure is to basically use the Custom picture mode and leave all the settings at their factory defaults, turn all the photo enhancement options off, and set the slideshow duration to SLOW, and to do this for 100 hours. He is very experienced with all this stuff so go with his method and you're good to go after 100 hours. If you've changed any of the settings in Custom mode even one click then selecting "Reset to Defaults" will restore the factory settings.
His 2011 Panel Aging procedure was different - he posted specific setting for Contrast and Brightness etc, but this year he went with the default Custom mode.
Is it best to use the bright contrast when breaking in the TV when its full screen and no logos, hten use the dimmer settings when there are logos on the screen for the first 200 or so hours?
(this is for the GT50)