Absolutely! As I've already indicated, the only item that the United States Coast Guard requires kayakers to carry along is either a flashlight or some form of an electric lantern. That is the only thing that is needed in kayaks. You are not required to bring along any special lighting or lantern because no regulations require that you do so. Our colleagues over at Sea Kayak Explorer have written an excellent piece on DIY Kayak Lights that you can read if you are interested in getting some ideas for making your own set of bespoke kayak lights.