I have replaced the lighting in both the Sunline and our toyhauler with the flat stick on led replacements. Take out the regular bulb, clean top of reflector with supplied alcohol pad, stick up led panel and plug it in. Saves power and, even more important when it's hot outside, they run extremely cool. Replace just one light and you will be so impressed that you will replace them all. I got mine on Amazon in boxes of 10.
Geanne & Clyde
1989 29' Sunline Seville T2953
2011 25' Forest River Work & Play