I'm sure this is just a quick way of saying "slider all the way to the left" above, but if you use any kind of tool or prop editor that lets you custom adjust brightness levels, don't go below 5 or so, and definitely never 0!
0 percent brightness is a black screen, and trust me, it is a ***** to undue when you can't see a damn thing.I speak from ill-gotten experience from when I was deep in the throes of a battery maximization obsession. It was not pretty, and my tablet has a lot less FCs now that I have quit trying to freeze "non-essential" processes/apps.
I have a brightness widget its really easy to change it since it has preset. Right now I can see perfectly at 0%, just a bit of reflection since its daytime. When screen is black (e.g. reading in nightmode) I use 2% when the room is dark. Otherwise I'm around 10% to 25%
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