Human Lightbulbs?

There is new research that shows that the human body emits bursts infrared light in the same rhythm as your heart beat. There is no known reason for this but most scientists think that it is simply a byproduct of the human body's natural thermal and chemical reactions
Link: Pubmed.gov

Also, humans emit small amounts of photons (visible light) from their hands, palms, feet and fore heads.
Link: Discovery