Summary
This field study found that while overall sleep quality did not differ significantly between summer and winter in healthy older adults, longer daily exposure to high illuminance (>1000 lx) was positively correlated with sleep efficiency the following night in summer. For lighting design in elder care and residential settings, these findings suggest that maximizing daily bright light exposure duration—regardless of season—may be a practical lever for improving sleep efficiency in older populations.
Key Findings
- Participants were significantly longer exposed to illuminance >1000 lx in summer than in winter (specific durations not reported in abstract)
- Significant positive correlation found between duration of daytime exposure to high illuminance (>1000 lx) and sleep efficiency the following night in summer
- Sleep quality measures (including sleep efficiency) did not differ significantly between summer and winter overall
- Tendency toward less frequent napping with longer daytime light exposure observed in both seasons
- Study population: 14 healthy older adults, measured via actigraphy over 5 consecutive days per season
Categories
Sleep & Circadian Health: Examines relationship between natural daylight exposure duration and sleep quality metrics in healthy older adults across seasons.
Dementia & Elder Care: Extends bright light sleep research from dementia populations to healthy independent-living older adults.
Author(s)
MPJ Aarts, JC Stapel, AMC Schoutens
Publication Year
2018
Number of Citations
19
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Dementia & Elder Care
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