I already had them set to .5 but turned them off to try this. Wow, it then took about 20-30 seconds for the screen to turn off. Tried several times. Put them back to .5 and turning off went back to taking 3 seconds. Edit: uninstalled my true blood live wallpaper and that stopped the turn-off lag. Too bad, I really loved the dark reds and black. So, if .5 is better than off, 1.0 must be even better, right? Nope, back to 30 seconds. Maybe this is just coincidental, but I'm leaving them at .5.