Summary
This CIE position statement establishes the scientific basis for non-visual (non-image-forming) effects of light beyond standard visual stimulation, addressing how retinal photoreceptors drive circadian, hormonal, and alertness responses. It provides foundational guidance for lighting designers and healthcare professionals seeking to apply evidence-based circadian lighting standards in built environments.
Key Findings
- The CIE recognizes that light affects human health and wellbeing through non-visual pathways in addition to visual perception, driven by specialized retinal photoreceptors including melanopsin-containing ipRGCs.
- The statement supports the use of melanopic-weighted metrics (such as melanopic equivalent daylight illuminance) as the appropriate measure for quantifying non-visual light effects in lighting design standards.
Categories
The Science of Light: This CIE position statement directly addresses the non-visual effects of light, covering photoreceptor biology, melanopic sensitivity, and lighting standards for circadian health.
Sleep & Circadian Health: The statement provides guidance on how light exposure affects circadian rhythms and melatonin regulation, with implications for lighting recommendations.
Author(s)
A TIL, TID DEN RETTE
Publication Year
2019
Related Publications
The Science of Light
- Phototransduction by retinal ganglion cells that set the circadian clock
- Color appearance models
- The mammalian circadian timing system: organization and coordination of central and peripheral clocks
- Diminished pupillary light reflex at high irradiances in melanopsin-knockout mice
- Melanopsin is required for non-image-forming photic responses in blind mice
Sleep & Circadian Health
- Phototransduction by retinal ganglion cells that set the circadian clock
- The mammalian circadian timing system: organization and coordination of central and peripheral clocks
- The two‐process model of sleep regulation: a reappraisal
- Melanopsin is required for non-image-forming photic responses in blind mice
- Strange vision: ganglion cells as circadian photoreceptors