Pretty sure a kayak might be illegal to fish on but frankly
I assume you mean at night?
There's a whole industry popping up around night-yakking (seems to be huge in the gulf states). This company named Kayalu, based in Mass, even specializes in making running-lights and pole-lamps for it (and their website claims they did "extensive" testing on the Charles and in the harbor). Just a shame the state sites don't hardly mention a thing about kayak regulations/laws other than the PFD requirement. They got a whole section on paddleboards though, lol. I sent the EP an email asking for clarification, I'll post whatever they write back (if they write back, haha).