I assume you are talking about the roof clearance lights. On our Canyon Star the bulbs were replaceable. Newmar used a waxy sealer on the screws but they did come out, then the whole fixture came off the roof. For your coach, when you remove the light you should be able to see whether you have a replaceable bulb or not.
Stewart, Brenda and kids
2008 Newmar Canyon Star 3410, now at a new home
2006 Roadtrek Versatile 210