Abstract：
:The regular rise and fall of the sun resulted in the development of 24-h rhythms in virtually all organisms. In an evolutionary heartbeat, humans have taken control of their light environment with electric light. Humans are highly sensitive to light, yet most people now use light until bedtime. We evaluated the impact of modern home lighting environments in relation to sleep and individual-level light sensitivity using a new wearable spectrophotometer. We found that nearly half of homes had bright enough light to suppress melatonin by 50%, but with a wide range of individual responses (0-87% suppression for the average home). Greater evening light relative to an individual's average was associated with increased wakefulness after bedtime. Homes with energy-efficient lights had nearly double the melanopic illuminance of homes with incandescent lighting. These findings demonstrate that home lighting significantly affects sleep and the circadian system, but the impact of lighting for a specific individual in their home is highly unpredictable.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Cain SW,McGlashan EM,Vidafar P,Mustafovska J,Curran SPN,Wang X,Mohamed A,Kalavally V,Phillips AJKdoi
10.1038/s41598-020-75622-4subject
Has Abstractpub_date
2020-11-05 00:00:00pages
19110issue
1issn
2045-2322pii
10.1038/s41598-020-75622-4journal_volume
10pub_type
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