It seems like there has been a lot of buzz lately about the importance of reducing light exposure at night and the impact it has on your health. I can certainly speak to it anecdotally - getting a nice pair of blackout curtains and putting electrical tape over the electronics LEDs in my bedroom seemed to do wonders for my sleep.
A quick search for sources led me to this article, which has a nice collection of links to studies for those interested in learning more: https://www.sleepfoundation.org/bedroom-environment/light-an...