Danny has lights made that might work. That'd be funny as hell if you all lit up your "vessels" and he couldn't say anything.

Danny made me lights (and some other guys too) with one red and one green that screw in on the board using the fin screw. We do a lot of night riding here. It's a genius design.
Put a white light on your helmet or head, and I bet you are good by Coast Guard regs.