attwood LED 3-Mile Transom Light 6556-7 THIS TRANSOM light includes a luxurious electropolished stainless cover that is both durable and great looking BUILT with high powered LED lighting for low power consumption of 1.5 Watts. RATED FOR 50,000+ hours of use MEETS USCG 3 Nautical Miles requirements for use on boats up to 164 FT (50 meters). VISIBILITY of 135 degree of light at 3NM (3 nautical miles) DIMENSIONS are 3-1/4" outside diameter and 2-1/2" center to center