From the USCG Aux:
March 2011 - CAUTION USING LED LIGHT BULBS
Word of caution when using LED light bulbs. A member of the communications team was having difficulty copying the signal from a D1N, VHF repeater, and could not understand why. He stated, “I had installed some LED replacement light bulbs and when we turned on the light, the VHF receiver input was desensitized.”
After reading the LED bulb package carefully, it states in very small print, "may cause harmful interference to sensitive marine band radio equipment. Do not install near sensitive life-saving marine communications equipment"
A word of caution for all members of the Coast Guard Auxiliary.
[Posted 20 March 2011, Source: Gary Young BC-RTI]