The GE90 Star is specially designed as as direct incandescent bulb replacement for the very popular #90 incandescent bulb used in many Perko (Bulb Fig. 0337) and other anchor lights. This bulb is 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 Perko Series 120, 170, 1301, 337, 362, 371, 455, 466, 1134, 1137, 1209, 1311, 1330, 1400, 1401, etc. (Reflector and clear lens are removable for use with nav ligths that are in axial direction with respect to the base of the bulb.)