Hobbs Marine Lamps are completely weatherproof and totally sealed against moisture ingress. This 50-watt flood lamp is designed to illuminate an 80°W x 30°H area of 50'W x 30'L. Hobbs 12V sealed beam replacement lamp measures 4.49"H x 6.9"W overall. Direct replacement for 4" x 6" marine flood lamp (item #80149). Does not include housing and bracket.