Vertical Mount LED Side Lights, 12 V. For use on power driven vessels under 20 meters (65.6 ft.) in length. 2-mile visibility. Uses 10 percent of the energy draw of standard lights. Low heat, long life and water resistant. Vertical mount. Screw size is 8. Housing: White, Size: 3-1/4" L x 2" W x 1-1/8" H. 12 V DC.