Surface Mounted: The SCM-4 model needs no major hull penetration below the waterline, only two mounting screws and a small hole for the cableRugged Design: 316 Stainless Steel and polycarbonate housing designed by engineers with years of experience in military product design. Shock and vibration resistant for operation at any speed. Stainless steel bezel prevents any damage to the light during installation. The light can actually flex to conform to up to 1/16" hull curvature over the length of the lightReverse polarity protected: LED light will not be damaged if it is inadvertently wired incorrectlySubmersible Grade Cable: Cable is constructed with 18 gauge tinned copper conductors and a submersible grade jacketNo extra modules required: Entirely self-contained, there are no additional driver or power supply to installAvailable in 5 Brilliant LED colors:Great White - The Brightest. If your looking for simple and bright then look no further.Aqua Green - Perceived as the best for attracting fish, easily penetrates the water.Bimini Blue - Most Popular. The light blue color penetrates the water, attracts sea life, adds amazing ambiance to your night-life on the water. Makes brown murky water behind your boat look like a swimming pool!Ultra-Blue - Dark blue with a component of ultra-violet light that brings a high-tech ambiance to the water around you, causes fluorescent objects to illuminate, attracts sea life, gives your boat a distinguishable look.Cool Red - Deep Red, looks better in the water than we expected it to. Specifications24 Watts of high efficiency LED lightInternal digital switching power supply operates at 94% efficiencyDimensions: 7.20ÓL x 2.38ÓW x 0.50"Thick (183mm L x 60mm W x 13mm Thick)Operating Voltage: 9 to 30 volts DC (brightness does not change)Current Draw: 2 amps at 12 volts DCHousing Materials: passivated 316 stainless steel with polycarbonate lensStandard Wire Length: 20 feet (6.10 meters) Lamp Life: 40,000 HoursWarranty: 2 Years