Five Oceans White Masthead Light, Black FO-543 Dimensions - Length: 2-13/64" (56 mm) Width: 2-7/64" (53.7 mm) Height: 2-57/64" (73.6 mm) Voltage: 12 Volts Wattage:10 Watts Bulb Type: Halogen Visibility: 1 Nautical Mile