Just check for Legality, I don't remember all the maritime laws but I remember something about lights and night. Nav lights must be on from dusk to dawn, built in headlights are only meant for docking purposes. And this is where I get fuzzy, I believe it is actually illegal if the boat is moving and you shine a bright light at another boater on the water. You may not intend to, but it is a possibility and if the other boater makes a complaint, you may not have a leg to stand on. Just a FYI, call to be sure if you can.