The Perko Fold Down All-Round Light is great for use on windshields, T-tops, rails, arches and hardtops. Perkos Fold Down All-Round light is designed for use on sailboats and powerboats less than 20m (65-1/2') 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 vertically 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 mount folds down out of your way when light is not in use Mounts are notched for thru-base wiring For more information, please refer to the Perko Fold Down All-Round Light instruction manual.