Blue light improves cognitive performance

Summary

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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Lehrl, S., Gerstmeyer, K., Jacob, J. et al. Blue light improves cognitive performance. J Neural Transm 114, 457–460 (2007). https://doi.org/10.1007/s00702-006-0621-4

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  • Keywords: Blue light, circadian rhythm, cognitive efficiency, alertness, speed of information processing