True one-to-one LED replacement bulb for incandescent navigation lights using 9mm miniature bayonet bulbs. Replaces Aqua Signal Series 20 nav & Series 25 deck light bulbs. 2 NM visibility, Warm White. Conformal coated & use of long life components. Constant energy consumption, regardless of voltage fluctuations from the source (10 to 15 VDC) Long service life, shockproof, and ultra-rugged. Very low power consumption (approximately 1 W).