Combination Sidelight - Combination Sidelight--One-mile combination sidelight for powerboats under 12 meters (39.4 feet). Meets ABYC Standard A-16. 12-volt D.C., 6 CP lamp included. Base is pre-drilled with two counter-sunk holes to accommodate 10 screws. Dimensions: 2-1/2 inch H x 3 inch L x 2-5/8 inch . Narrow base permits installation on decks or narrow gunwales. Housing is die-cast ZAMAK with Perma-Plate® chrome finish. Easily replace bulb without removing light from boat.