Yes, I try to look on the bright side of life, but brightness of light, as in sunshine, is not good for me. Seeing too much brightness is like seeing too much movement, my brain overloads.
When there is sunshine I want to get out and garden, paint or whatever but I have to make a choice; either go out and get punished later by being totally wiped out. Or, go into a darkened room for a while and then come out ready. It seems counterintuitive but the second way works best, so I try to do this unless I have a reason to stay up like socialising or having a meeting, in which case I do get wiped out.