Solar powered Flattop™ buoy light is the most durable, efficient solar buoy light made in the United States. Me ets or exceeds U.S.C.G. specifications for solar powered buoy lights. All solar lights have programmed flash rate or all IALA flash rates, special flash rate available upon request.When reliability is a factor, you can count on the solar powered Flattop® buoy light to work under the most extreme conditions.