Perko 13 Horizontal Fold Down All-Round Boat Navigation Light This Perko 13 Horizontal Fold Down Boat Navigation Light features a frosted globe that allows for a reduced glare at night. It has a black polymer top with a black polymer base. The fold down, adjustable angle makes it easy to use and easily adaptable. It is certified for use on power driven vessels up to 20 meters 65.6 ft. in length and has a polymer adapter available for flat or V type mounts. This boat navigation light contains a n