I had fluorescents in my previous coach (SOB) and over the years several of them went bad. Typically it was the ballast. I end up replacing the fixtures with LED units that ran cooler and used a lot less power.
LEDís are a lot cheaper now. You might consider going that route.
Dan & Linda
FMCA 399045 NKK 22240
2020 Dutch Star 4081 - Spartan K2
2017 Dutch Star 4018 - Sold - Towing Jeep Grand Cherokee Trailhawk