RPM

My bathroom has a single switch controlling a florescent supply with two bulbs and a single incandescent. With a standard switch there is no buzz what so ever. I have tried two models of older SwitchLinc Relays (2383 and a 2385W). Both cause a very loud buzzing in the florescent supply. 1) Any suggestions on how to fix this problem? 2) What are the chances that a newer SwitchLinc V2 Relay Insteon/X10 will not have the same problem? (I'd just buy one if I had any faith it would not buzz, but I am nearly sure it would end up having the same problem)