Injection Molded Polycarbonate. LED Portable Underwater Light is a great way to light up the water without cutting a hole in your boat. Just plug it into any 12 volt receptacle and throw it overboard. Total stretched length is approximately 15 feet. Sea-Dog Line is a 3rd generation family company with a history of satisfied customers stretching back to the companys start in 1933. The company is the recipient of multiple industry awards for quality and efficiency.