Propspeed Lightspeed Light Foul-Release Coating Covers Approximately 4 Lights Underwater Lights [LSKIT]Lightspeed Light Foul Release Coating Covers Approximately 4 Lights Underwater Lights More Light. Less Fuss. Keep your lights shining bright all season long. Underwater lights are just as susceptible to marine fouling as any other underwater surface which can result in reduced visible light, and efforts to remove barnacles can result in damaged lighting components. Lightspeed is a transparent coating that is an easy and affordable way for boat owners