Perko Sidelights are certified for use on sailboats or powerboats under 20 meters. Red port sidelights shine from dead on to 112.5 aft on either side. The black polymer base provides sturdy but lightweight construction and the colored lenses produce light visible up to two nautical miles away. Key Features Black polymer base for strength 5 visibility arc with two nautical miles of visibility For more information, please refer to the Perko Sidelights instruction manual.