PERKO UNDERWATER LIGHT POLISHED BRASS. Create atmosphere, attract bait and increase visibility while you enjoy that night swim. Thru-hull mount, requires 2-3/8" diameter hole. Comes with two 12V, 50W, 4.1 amp bulbs (800 Lumens each). 25 degree beam (3000 candle power) and 40 degree beam bulb (1700 candle power) included. Average bulb life: 5000 hours. Interchangeable blue & green colored filters snap into the lens. Safety seal design prenents water intrusion in the event of glass breakage. Easy access for bulb changing while boat is in the water. Includes 10 feet of 16/2 electrical cable and installation instructions. Dimensions: length overall: 6". Flange diameter: 3-3/4". Fixture: Polished Brass.