Eh...  Not sure if that question counts towards me, I've always been sensative to certain brightnesses of light.  Like fully sunny days I can stand, but those still fully cloudy days without rain always give me a headache if I go outside without sunglasses.  Though all I tend to want to do with the headaches is crawl into bed and sleep, my room on campus and at home are both pretty dark even with lights on, so...  Honestly, not sure.