We have a 19ft Flying Cloud and have owned it about months. The entry light (low to the right on the outside) is very loose but I can't quite figure out how to take it off to fix it. I'm afraid of breaking it. I know it's still under warranty but we are full-timing and live in rural idaho so getting it in for repairs is a challenge.
Mine is screwed to the outer skin with two screws. Try removing the screws and there should be a gasket or caulking to seal it to the skin. If it is really loose then it is likely a gasket. I would bed it in caulk and put in slightly larger threaded screws.
Thanks big Al unfortunately I described the wrong light! It's actually the running lights and now both front and rear are loose on the entrance side. Guess I better repost to try and get the right info. Sorry about that!