The sunlight thing is real. I used to like everything dark and it really messes up my mental health. Although i don't go out much and get directly under the sun, I can say that avoiding too much artificial light and having the window sills opened in the dayreally helped..

I guess my issues has more to deal with being in a room with 1001 useless stuff sprawled over any horizontal surface and just feeling so frustrated at it as it slowly eats away at my concentration.