Natural light-dark exposure measured against circadian timing in adults living in an electrical lighting environment
Wright KP, McHill AW, Birks BR, et al. (2013) · Current Biology
The study reported that one week of camping exposure to natural light without electrical lighting advanced melatonin onset and offset by about two hours and aligned internal circadian time with sleep timing, following a modern electrical lighting week in which participants received about four times less daytime light.
What they studied
8 healthy adults, Colorado, one week electrical lighting then one week camping
What they found
The study reported that one week of camping exposure to natural light without electrical lighting advanced melatonin onset and offset by about two hours and aligned internal circadian time with sleep timing, following a modern electrical lighting week in which participants received about four times less daytime light.
What it does not establish
This entry reports the study. It is not a statement about any building Sage Co. designs or constructs.
Source
- Wright KP, McHill AW, Birks BR, et al. (2013). Natural light-dark exposure measured against circadian timing in adults living in an electrical lighting environment · Current Biology · Read at the source
Last reviewed September 23, 2026.
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