With industry leading durability and brightness, high-performance HP and HPX underwater lights provide 61%-84% more lumens than leading competitors. Outstanding features include an efficient low-profile design, with stainless steel bezel, heat sync cooling system (with active over-heat protection) and waterproof-sealed electronics. Lights are corrosion and chemical resistant, for long-term durability in the marine environment.Bulb Type: LEDFixture Material: Stainless steel case; High impact plastic lensMounting: SurfacePower Requirements: 12V DCHole Diameter: 9/16"dia. cutout (For power cable)Mounting Fasteners Required: Two #8 flathead stainless steel, includedWarranty: 10 yearsDimensions3-LED: 4"L x 2 1/8"W x 1/2"D6-LED: 5"L x 2 1/8"W x 1/2"D12-LED: 6"L x 2 3/8"W x 1/2"D