we changed all of them in our class B it was definitely worth the cost, better light quality and the house batteries last much longer. Before you buy the all buy one cool and one warm and see what you like. I prefer the cool in te living areas, they seem much brighter and crisp, and warm in the bedroom it is a softer light and not as intrusive. I switched them all in my boat several years ago (like 4 years), haven't had a failure in a bulb yet.
Matt & NathaLee
2006 Tiffin allegro 32 BA