I know it sounds childish as f**k but this has caused me to have several habits form:
1. Keeping a flashlight in my back pocket (when its evening) at all times
2. Inability to sleep if I can no longer see light emitting from a light source when I'm trying to fall asleep
3. Dimly lit rooms are a no-go for me (without at second person accompanying me)
4. Rooms with a faint light source are a no-go for me (without a second person accompanying me)
5. If you turn the lights off on me without warning, I will immediately freeze up in fear, but if you give me a warning and then turn the lights off, I won't freeze up as much.