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For setting circadian rhythm, what defines "blue light"?

Asked by pallen123 (1519points) April 9th, 2011

I have seen panels of blue LED’s and goggles with blue lights that are sold to mimic sunlight in order to reset circadian rhythm. What constitutes sufficient “blue light” for this purpose? If I go to radio shack and buy blue LED’s and plug them in to a battery and put them inside my sunglasses, will that be sufficient? Is there a lumens rating or some other such technical benchmark I have to attain for it to work?

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