The Bay15D 50 LED Replacement Bulb will replace your conventional light bulb, instantly converting your navigation lights to LED navigation lights for boats up to 20 meters. Available colours are White, Red, Green, Two Colour Red & Green and Three Colour Red, Green & White to fit all versions of the navigation lights. The LED bulbs consume merely 3.5 Watts and have the same light output as the conventional 10Watt & 25Watt light bulb. They are insensitive to the movements and vibrations of the ship and future a life-time over 50.000 hours