My son wants to leave his light on, and he’s 13. His father wants it out, because, reasons, blah, blah. Thing is, my brother slept with the ceiling light on from the time he was about 8, until he was about 15 or 16. Then he just stopped. I don’t know why. My son is so much like my brother, it’s funny-- looks like him, acts like him, sounds like him, has the same talents, and a lot of the same habits, like eating all of one thing on a plate, eating all of another, and so on. I think DS just has some weird biological proclivity to sleep with the lights on. Finally compromised with his father, and now he is allowed to sleep with a pretty bright desk lamp, but no ceiling lamp.
It doesn’t even have happened to her. If she was little, and someone told her the story of Elizabeth Smart being kidnapped by someone coming through her window at night, it could have freaked her out.
Sometimes when I’m stressed, especially when I go to bed first, or when I’m alone for the night, I want the TV on. I like the sound of voices talking-- but what I need are shows I’m familiar with. If it’s new, I start watching, get interested, and stay up watching. That’s not the idea.
I have the TV on like some people play music. I have playlists of shows I’ve seen many times, and I play them at night, or when I’m doing chores, or baking. Now, our TV, you can program to shut of after 2 hours, but that feature wasn’t common many years ago.
OP, since the blinds were down, are you sure the light wasn’t from the TV? I know you are thinking that TV isn’t that bright, but it can look pretty bright at night, especially when it’s keeping you awake, and you are hyperfocused on it.