No definitive answer exists to whether or not you need lights on a kayak, as it depends on various factors such as where and when you'll be paddling. However, many experts recommend bringing some form of lighting device (e.g. flashlight, headlamp) in case of an emergency situation. If you'll be paddling in areas with low visibility (e.g. at night, in fog), then having lights can help you stay visible to other boats and avoid collisions.