This twin bulb fixture from Perko can be used as a masthead light or an all-round light. Perkos Fold Down Combination light can be used as a 20pt white masthead or a 32pt white all-round light on sailboats and powerboats less than 20m in length. Designed to provide three nautical miles of visibility and reduce glare, these lights are ideal for boats operating between sunset and sunrise or in low visibility conditions. With a fold-down adjustable angle base, you can move this light out of your way when not in use. Key Features Mounts horizontally Clear polymer lens with reduced glare design Black polymer top and base for strength and chemical resistance Polymer adapters for flat or V” type mount contains notch for through-base wiring Adjustable angle base folds down out of the way in daylight/good visibility conditions Includes 12Volt bulb Mounts are notched for thru-base wiring For more information, please refer to the Perko Fold Down Combination Light instruction manual.