How to Make Your iPhone Display Dimmer Than Standard Brightness Controls Allow
Lastly, I use Color Filters (Color Tint) found in Display Accomadations to make an extreme version of Night Shift, whereby my screen removes almost 99% of blue and green light, making my screen appear an ultra red. This in my opinion is more effective than lowering the brightness and Night Shift alone, because you can actually have your screen at a comfortable brightness to read black and white text, but still fall easily asleep.
I’d love to help write and article or video on this process, because I use it every night and have no problems falling asleep while using my phone, and I think others can benefit from it too.