Bi-colour Polar Star 40 double color 12V LED Indexed bulb (for aqua signal only) for top base mount bow lights. The Polar Star 40 series is specially designed as direct incandescent bulb replacements for not too popular brands of navigation lights such as Perko series 1127 & 1130 etc. These bulbs are fabricated from the highest quality components to assure long life and trouble-free functioning. Their patented internal circuitry provides consistent brightness and makes them immune to life-shortening voltage fluctuations. Their incredibly low power draw (~1W) makes them the perfect way to reduce energy consumption. For aqua signal series 40,41,42,50,55; etc.