Cited by 447Circadian rhythm and melatoninLight effects on plantsImpact of Light on Environment and Health

Spectral Responses of the Human Circadian System Depend on the Irradiance and Duration of Exposure to Light

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Gooley, Joshua J., Rajaratnam, Shantha M. W., Brainard, George C., Kronauer, Richard E., Czeisler, Charles A., Lockley, Steven W.·2010·Science Translational Medicine

Abstract

Light resets the circadian clock through a non–image-forming receptor system—or so it was thought; now, cone photoreceptors are shown to also participate.

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  • For irradiances between 2E12 and 1.5E14 photons/cm2/s, blue (460 nm) light outperforms green light (555 nm) in phase-shifting effects, whereas blue light yields smaller phase-shifts than green light of identical photon density at lower intensities (2.5E11-2E12 photons/cm2/s).

    “Interestingly, a recent study indicated that for irradiances between 2E12 and 1.5E14 photons/cm2/s, blue (460 nm) light does in fact outperform green light (555 nm) in phase-shifting effects, whereas blue light yields smaller phase-shifts than green light of identical photon density at lower intensities (in the 2.5E11-2E12 photons/cm2/s range) [34].”

    From Low-intensity blue-enriched white light (750 lux) and standard bright light (10 000 lux) are equally effective in treating SAD. A randomized controlled study (2011) · cites this paper as [34]

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  • Cones contribute to non-visual effects of light, though at a different time scale than the ipRGCs.

    “Indeed, there is evidence that cones do contribute, though at a different time scale than the ipRGCs [42].”

    From Effects of light on human circadian rhythms, sleep and mood (2019) · cites this paper as [42]

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Authors
Gooley, J. J., Rajaratnam, S. M. W., Brainard, G. C., Kronauer, R. E., Czeisler, C. A., & Lockley, S. W.
Affiliations
  • Brigham and Women's Hospital (US)
  • Thomas Jefferson University (US)
Corresponding author
Lockley, Steven W.
Venue
Science Translational Medicine
Published
2010-05-12
Volume
2
Issue
31
Pages
31ra33-31ra33
ISSN
  • 1946-6234 (ISSN-L)
  • 1946-6242
OpenAlex
W2133026008
Cited by
447
References
60
Citations by year
2026: 17 · 2025: 19 · 2024: 17 · 2023: 45 · 2022: 37 · 2021: 36 · 2020: 33 · 2019: 32 · 2018: 30 · 2017: 26 · 2016: 26 · 2015: 16 · 2014: 16 · 2013: 29 · 2012: 30
FWCI
13.87
Type
journal article
Language
en
Open access
Locations
  • Science Translational Medicine (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • National University of Singapore (submittedVersion)
  • Surrey Research Insight Open Access (The University of Surrey) (submittedVersion)
Funders
  • National Heart, Lung, and Blood Institute (T32 HL 07901, T32HL007901)
  • National Institute of Mental Health (R01MH045130, MH45130)
  • National Institute of Neurological Disorders and Stroke (NS36590, R01NS036590)
  • National Center for Research Resources (M01 RR 02635, M01RR002635)
  • National Center for Complementary and Integrative Health (AT002129, R01AT002129)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Light effects on plants
  • Physical Sciences › Environmental Science › Global and Planetary Change › Impact of Light on Environment and Health
Keywords
circadian rhythm, circadian photoreception, cone photoreceptors, melanopsin, melatonin suppression, blue light, green light, light intensity dependence, exposure duration, phototherapy, sleep disorders
MeSH terms
Melanopsin, Adolescent, Adult, Circadian Rhythm, Dose-Response Relationship, Radiation, Humans, Light, Melatonin, Phototherapy, Retina, Retinal Ganglion Cells, Rod Opsins, Photoperiod, Retinal Cone Photoreceptor Cells, Young Adult

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