I recently put an LED bulb in my all round white masthead light. It was supplied to fit an Aquasignal light. It works fine but for some reason causes bad static on the VHF. It only affects the main VHF, not the handheld or HF radio. Its on a different circuit from the VHF. I also have an LED anchor light, that plugs into a cigar lighter type socket and that doesn't cause any problem. Any ideas why and how to fix it, otherwise I'll be putting the original bulb back.

Thanks, Colin