Circadian photobiology: an emerging framework for lighting practice and research

@article{Rea2002CircadianPA,
  title={Circadian photobiology: an emerging framework for lighting practice and research},
  author={Mark S. Rea and MG Figueiro and JD Bullough},
  journal={Lighting Research \& Technology},
  year={2002},
  volume={34},
  pages={177 - 187}
}
A century of research and practice have optimized the use of electric lighting in buildings to support human vision. However, recent lines of research show that light is also important to human circadian regulation, as reflected in such diverse phenomena as depression, sleep quality, alertness, and, perhaps, even health. Although light is essential to both vision and circadian regulation, research shows that the biophysical processes that govern circadian regulation are very different from… 

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References

SHOWING 1-10 OF 45 REFERENCES
Light in the Built Environment: Potential role of Circadian Disruption in Endocrine Disruption and Breast Cancer
TLDR
If electric lighting as currently employed contributes to `circadian disruption' it may be an important cause of `endocrine disruption' and thereby contribute to a high risk of breast cancer in industrialized societies.
FAILURE OF EXTRAOCULAR LIGHT TO FACILITATE CIRCADIAN RHYTHM REENTRAINMENT IN HUMANS
TLDR
Testing whether this extraocular light stimulus could accelerate the entrainment of circadian rhythms to a shift of the sleep schedule, as occurs in shift work or jet lag, found no evidence that the poplitealextraocular light had a phase-shifting effect.
Action Spectrum for Melatonin Regulation in Humans: Evidence for a Novel Circadian Photoreceptor
TLDR
The results suggest that, in humans, a single photopigment may be primarily responsible for melatonin suppression, and its peak absorbance appears to be distinct from that of rod and cone cellphotopigments for vision.
The effects of environmental illumination on melatonin, bodily rhythms and mood states: a review
This review of a wide-ranging and multidisciplinary topic is oriented towards those who have interests in researching into, designing or specifying lighting for working and living environments. The
Extraocular light exposure does not suppress plasma melatonin in humans.
TLDR
Extraocular photoreception, if it exists in mammals, does not affect the suprachiasmatic nucleipineal pathway and suppression of melatonin levels are observed.
Sensitivity of the human circadian pacemaker to nocturnal light: melatonin phase resetting and suppression
TLDR
It is demonstrated that humans are highly responsive to the phase‐delaying effects of light during the early biological night and that both the phase resetting response to light and the acute suppressive effect of light on plasma melatonin follow a logistic dose‐response curve, as do many circadian responses to light in mammals.
Melatonin Suppression by Illumination of Upper and Lower Visual Fields
TLDR
The results suggest that bright light treatment of depression or circadian phase disorders might be most effective when applied in the upper visual field.
Human Melatonin Suppression by Light is Intensity Dependent
TLDR
It is suggested that when examining the melatonin sensitivity of patient groups to artificial light, an appropriate light intensity should be established in each laboratory, and light of less intensity may be more suitable to dichotomize patient groups from control subjects.
...
1
2
3
4
5
...