Aqua Signal White 12V 10W Stainless Steel 50 Series All Around Light. With their stainless steel housing, the Series 50 is Aqua Signal's premium series. These lights combine striking appearance with exceptional quality and durability. On Series 50 lights the wires exit from the bottom of the fixture. Bulb changing is easy and requires no tools. Simply loosen the knurled collar on the bottom of the fixture, and the socket and bulb drop out the bottom. Minimum visibility is 2 nm and 3 nm for masthead lights. Waterproof to IP56 standards. Elegant stainless steel, saltwater resistant, nonmagnetic housing Acrylic Fresnel lens provides proper beam.