Working in an office without a window is pretty awful. Not only are you missing out on gawking at people walking below, it’s also affecting your sleep.  

Well that’s according to a new study published in the Journal of Clinical Sleep Medicine. The results of the study found that workers who worked in an office with natural light slept three quarters of an hour longer than their counterparts who didn’t have any.

Phyllis Zee, senior study author explains: “There is increasing evidence that exposure to light, during the day—particularly in the morning—is beneficial to your health via its effects on mood, alertness, and metabolism,”

“Workers are a group at risk because they are typically indoors often without access to natural or even artificial bright light for the entire day. The study results confirm that light during the natural daylight hours has powerful effects on health.”