The United States Coast Guard (USCG) recently issued an alert regarding the potential for Electro Magnetic Interference (EMI) between some LED lighting products and vital communication devices like VHF radios and Automatic Identification Systems (AIS). EMI occurs when an electromagnetic wave emits from an electronic circuit in one device at a frequency that conflicts with the communication frequency used by another device. VHF and AIS operate between 156 MHz and 165 MHz, so any other nearby device emitting in that frequency range may cause EMI.