On my phone running iOS, in addition to the brightness slider there is an option under Settings -> General -> Accessibility Display Accommodations to "Reduce White Point", which I can use to further dim the screen.
I think this is nearly identical to using a dark theme; it doesn't actually reduce the brightness of the backlighting.
I have been wondering for a long time what determines the backlight minimum, why can't we go darker? Surely phones can be expected to be used in pitch black?
I have been wondering for a long time what determines the backlight minimum, why can't we go darker? Surely phones can be expected to be used in pitch black?