I really hope he isn't paying for that office. That's suicide, waste of money. And it looks like it doesn't have any real windows. When you are depressed things aren't going the way you hoped, you want to be able to see the light of day.
I agree about sunlight. I've spent long hours working alone at night and you have to force yourself into human contact before quietly slipping into the blues.
I try to keep one of the two, though they are somewhat interchangeable.