I had a noticeable difference in image retention between 5 hours and 100 hours. But that's not the reason I ran the images. It's the second part. To get all the pixels through their most rapid change period at the same time. Yes, all pixels will eventually have 100 hours on the clock. But I was wanting my display to have the most constant picture as soon as possible. Using a burn-in procedure will do that. I'd be afraid to leave my TV on any station for 100 hours, because they all have those bugs in the lower right, I don't need my panel branded with Siffy's logo.

Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs