So having young kids and having to get-up during the night (and using my iPhone as a torch quite often) I'd like this feature to be tied into Do not Distrub, ie when DND is on, raise to wake is disabled.
My use case is that at 4am this morning, after working for 1.5 hours to get my littlest back to sleep, I picked up my phone and a brilliant glow of iPhone lock screen (I have a dark lock screen image, however had inverted the colours enabled, so bright white light did ensue) caught the attention of not sleeping beauty.
A system wide dark mode would also be very much appreciated at some point.