cross-posted from: https://wolfballs.com/post/25980

https://www.sleeplikethedead.com/darkness-sleep.html

Sleeping in complete darkness is important to getting a good night's sleep because darkness or night increases the production of melatonin.

Melatonin is believed to cause a person to fall asleep faster and sleep better.

If you are exposed to light while you are trying to sleep, melatonin may not rise to high enough levels to do its job. Light coming in from the window, light entering from another room, or even a night light can disrupt the production of melatonin. In other words, if you want the best opportunity to fall asleep quickly and sleep soundly, you must have darkness.

Has anyone's sleep improved by making sure their room is completely dark?