Summary
This invited commentary addresses whether the law of reciprocity (intensity × duration = constant effect) holds for circadian-effective lighting, with implications for how lighting designers specify exposure duration and intensity to achieve circadian outcomes. Understanding the limits of reciprocity is critical for developing accurate lighting standards and melanopic EDI recommendations.
Categories
The Science of Light: Discusses ipRGC photobiology, the retinohypothalamic tract, and SCN circadian mechanisms in the context of reciprocity for circadian-effective lighting.
Author(s)
LJM Schlangen, S Belgers, RH Cuijpers
Publication Year
2022
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