A newly discovered system of photoreceptors for circadian rhythms works non-visual and responds to blue light (460 nm). We report a longitudinal study in 44 adults, showing that a significant increase in alertness and speed of information processing could be achieved by blue light as compared to normal light.
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| http://dx.doi.org/10.1007/s00702-006-0621-4 | DOI Listing |
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