Non-Visual Effects of Light on Melatonin, Alertness and Cognitive Performance: Can Blue-Enriched Light Keep Us Alert?

Blue-enriched compact fluorescent lamps (6500K) at low intensity (40 lux) significantly suppress melatonin, enhance alertness, and improve sustained attention compared to warmer light sources (2500K, 3000K), indicating a blue-shifted sensitivity of the human alerting and...