I'd be worried if I was your Dad too!! Depends on the type of area you live in.
There is dark in your known territory and there is dark in the unknown where you don't know what's round the corner!!
I always sleep with the radio on, speech radio, not from fear, I just don't like silence very much, and it helps me sleep, and if I wake up I can listen to it without moving until I fall asleep again. Done it for years & years.
Unless I have company in my bed of course, then I don't need it