NauticLED Bay15D LED White. NauticLED is a high quality LED navigation lamp for masthead applications. Features Bayonet indexed Internal 10-35VDC stabilizing driver 6000K CCT Specifications Energy used:2.4 Watt Equivalent to:25 Watt (halogen) Color:6000K (cool white) Light angle:360 Bulb base:Bay15D (index double contact bayonet) – 1157 Input voltage:10-35VDC, internal regulated Dimensions:18×37 mm Typically Suits Aquasignal series 40, 41, 42 and 55