Recommendations for daytime, evening, and nighttime indoor light exposure to best support physiology, sleep, and wakefulness in healthy adults.
Level 5 - mechanism / opinion, no new human data
Expert scientific consensus and guideline framework without new primary empirical data.
PubMed 35298459 · doi:10.1371/journal.pbio.3001571
What was done
An international expert consensus formulated indoor ocular light exposure recommendations across the 24-hour day for healthy adults. The framework utilizes a standardized, SI-compliant metric—melanopic equivalent daylight illuminance (melanopic EDI)—derived from analyses of human circadian, neuroendocrine, and alerting responses mediated by melanopsin-expressing retinal neurons.
What was found
The abstract reports no numerical values or specific quantitative thresholds. It states that expert scientific consensus established lighting recommendations based on melanopic EDI to support human physiology, sleep, and wakefulness across daytime, evening, and nighttime periods.
Why it matters
This report translates non-visual ocular photobiology into standardized, SI-compliant indoor lighting targets to guide architectural and lighting design for health and circadian alignment.
Limits
The abstract describes an expert consensus guideline rather than primary empirical data. No numerical exposure thresholds, sample sizes, or underlying study counts are provided in the abstract text. Recommendations are restricted to healthy adults and may not generalize to clinical populations or shift workers.
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