Bill Tindall, E.Tn.
This interference to FM signals, radio or TV, comes from the ballast and varies with ballast. I replaced the ballast in a fixture in the kitchen and the new one wiped out one channel of the TV. Before I got around to selecting a ballast that didn't interfere we went to satellite TV which avoided the problem. If you face an FM signal interference, an option is to replace the ballast and not the fixture. You may have to go to a "full service" lighting store to get a suitable ballast.