Short‐wavelength enrichment of polychromatic light enhances human melatonin suppression potency

A total of 24 subjects demonstrated that increasing corneal irradiances of light resulted in progressively increasing suppression of nocturnal melatonin.

• Short-wavelength visible light is most effective for regulating neuroendocrine, circadian, and neurobehavioral functions.
• Polychromatic fluorescent light enriched in the short-wavelength spectrum may enhance melatonin suppression compared to other light types.
• The study utilized a within-subjects design to assess the relationship between light exposure and melatonin levels.
• Each type of fluorescent lamp tested varied in short-wavelength light emission between 400 and 500 nm.
• No safety concerns were identified for the light exposure levels used in the experiments.

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