I should have been a little more clear. Sorry about that! I find that the lowest setting is too bright at times.
In Android there are a few screen dimming apps (display filter) and I find this to be much better.
So what I'm asking, is there a way to go below the minimum "slider" setting? I don't want zero brightness obviously (screen off) but would like the range say between 10% and 60% that's missing to be available. I would call the GUI slider to be between 60-100% of the phone's available brightness. It'd be nice if there were less brightness available.