Perkos Delta Series Universal Fit Pole Lights feature a "universal-fit" design allowing these lights to fit all popular base angles from 0 to 20 rake. Each light includes a reduced glare globe to preserve night vision while underway and a full output globe offering full cockpit illumination while still meeting navigation light requirements. These lights also come with locking, large threaded collars, and two pole screw positions to allow use with most pole light bases on the market. All electrical contacts are gold plated to assure long life in the marine environment. Key Features Provides two nautical miles of visibility Uses 2 pin bases, 0 to 20 rake Corrosion resistant USCG and European CE approved for use on powerboats under 20m (65.6'). For more information, please refer to thePerko All-Round Light instruction manual.