Some LEDs produce large amounts of RFI well into the VHF spectrum. Interference at HF frequencies is certainly an issue, but most of us aren’t on the SSB all day and the noise is pretty obvious in SSB or AM modes. I can turn lights on and off until it goes away. Noise up into VHF is far more insidious. You might never hear it, but it can severely de-sense FM reception anyway. AIS is tricky, no one listens to AIS, so you will just wonder why you have no targets that are not 1 mile or less distant. LED anchor lights or masthead running lights can be the worst of all, they are right next to the VHF antenna.
Joe Coquina
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