I've noticed when I set my screen brightness to the minimum from the system settings, some other utility apps like AVG and Android Assistant show it's only at 11% brightness. If I turn those down to zero, it really makes the screen dark, but it doesn't stay. When I back out of the setting, it doesn't save if it's below that 11% (it does save if above that, though). Is there a way to get the phone to hold that extra low setting?
Right now I use a screen filter app that's like virtual window tint. It works well, but discolors the screen a little. I often use the phone in low light situations where even the factory minimum brightness is too bright, and would love to do this strictly via backlight.