I never thought about that.  My husband sleeps with his head under the covers and seems to be doing fine.  Occasionally I'll wake up with the covers over mine.  I think enough air is still able to come through.  I mean, we're all still alive, right?  :)

I don't see any harm in the night light.  At least you won't trip and bump into your bed or the wall like I do sometimes when I get up in the middle of the night to use the bathroom!

yes GreenFish but I'm 18 i should of been done with night lights along time ago but I just find confort in them... and haha yes we are still alive.