I sleep with the room light off, but there MUST be a sliver of light coming from another room. Sometimes i wake at night, and survey the room- so there has to be adequate light to make out everything in the room, but not so much to the point where it prevents sleep.

If it's too dark, I'm too afraid to sleep.

If it's too bright, it's too uncomfortable to sleep.

Thankfully, we were able to find a balance

P.S. Thank you for the thread.