If you're old enough to remember when talking about someone's aura was not considered completely off the wall, then you may get a bit of satisfaction out of knowing that indeed we do glow with visible light-- and it's been photographed.
Scientist at Kyoto University in Japan placed subjects in a totally dark room 20 minutes every three hours from 10 a.m. to 10 p.m. for three days, with cameras sensitive enough to record single photons. Not only could they record light emanating from the subjects, they were able to record its rise and fall during the day-- lowest at about 10 am. and highest at 4 pm. You can read more at LiveScience.