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by andrewmunsell 3812 days ago
Maybe they were referring to something along the lines of this? (Note: I have not seen the study referenced in my linked article, and cannot vouch for the accuracy of Flux's statement)

http://www.health.harvard.edu/staying-healthy/blue-light-has...

"But we do know that exposure to light suppresses the secretion of melatonin, a hormone that influences circadian rhythms, and there’s some experimental evidence (it’s very preliminary) that lower melatonin levels might explain the association with cancer."