I used to have a difficult time reading a book on my iPad before bed, even on the lowest brightness setting. The eerie glow, no matter how faint, would slowly but surely sap the tiredness away from me. The next thing I knew it would be three in the morning and I would be wide awake.
Now, when I’m alone, I just leave my bedside light on. With the easy addition of ambient lighting, I don’t get that screen-induced insomnia.