Workers in offices with windows get more and better sleep at night, are more
physically active and have a higher quality of life than those in windowless
offices, a new study finds.
The study included 49 day-shift office employees, 22 in workplaces with
windows and 27 in windowless workplaces. Those in offices with windows received
173% more white light exposure during work hours and slept an average of 46
minutes more a night than those in windowless offices.
Employees in offices with windows also tended to be more physically active,
had better sleep quality and efficiency, fewer sleep disturbances, less daytime
sleepiness, and higher quality-of-life scores.
Daylight and quality of work
"The extent to which daylight exposure impacts office workers is remarkable,"
study co-author Ivy Cheung, a doctoral candidate in the interdepartmental
neuroscience program at Northwestern University in Chicago, said in an American
Academy of Sleep Medicine news release.
The architectural design of offices should take into consideration how
natural daylight exposure may contribute to employees' well-being, the
"Day-shift office workers' quality of life and sleep may be improved via
emphasis on light exposure and lighting levels in current offices, as well as in
the design of future offices," Cheung said.
Although the study found an association between worker well-being and
windowed workplaces, it didn't establish a cause-and-effect relationship. Also,
data and conclusions presented at meetings should be considered preliminary
until published in a peer-reviewed medical journal.
The US Centers for Disease Control and Prevention has more about sleep.