Hella Navigation Lights Series 2984 Stern Light White lamp. 135 arc. Visible 2 nautical miles. For use on sail or power driven vessels under 65.6' in length. Features: optically designed lens, black or white plastic housing, and nonmagnetic, seawater resistant construction. Easy to fit with detailed mounting instructions. Lights comply with A-16 ruling. Dimensions: 4 " H x 4 " W x 3 " deep.