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Cold light

How do glow worms produce light?
http://www.ehow.com/how-does_5272834_do-glow-worms-produce-light.html

An New York time article, Scientists, Seeking Cold Light, Find Some Persons Faintly Luminous
http://query.nytimes.com/mem/archive-free/pdf?res=F50A11F93E5E1A738DDDA10A94DD405B828EF1D3

Phosphorous and cold light
http://www.encognitive.com/files/Phosphorus.pdf
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