Details Navigation Lights

According to the Coast Guard -- A vessel under oars (paddles) may exhibit the same lights as a sailing vessel, but if she does not, she shall have at hand an electric torch (flashlight) or lighted lantern which shall be exhibited in sufficient time to prevent a collision.  This rule also applies to sailing vessels less than 7 meters (22.97 feet) in length.

You must have at least one handheld flashlight close at hand while paddling at night.  I also suggest reflective tape at several points on your hull, and a white light strapped to the back of your PFD or the back deck of your kayak.

DO NOT use a strobelight for normal night paddling.