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  • Description

Tower Navigation Bayonet (back-entry) LED Replacement Bulb,Cool White, 10-30VDC (3.0W), Omni-Directional, BAY15d Socket

This is the highest output LED tower cluster available for marine use. It uses 18 surface mount cool-white (SMD) LEDs arrayed in 6 planes for 360° visibility. Proprietary PWM Constant-Current chipset results in high performance across the entire 10-30VDC range. This product is ideal for masthead (anchor light) and stern lamp applications in fixtures that use a BAY15d bulb (double contact, offset pins). Fits Aqua Signal Series 40, 41, 42 and 50, as well as Hella 2984 and Perko 200 Fixtures (clear lens fixtures only). Replaces Aqua Signal bulb #90005, Hella bulb #78290 and Perko bulb #037512V10W.

Cool White is recommended behind clear lenses because it has a higher luminous output than Warm White. Because LEDs have a narrow spectrum, we don't recommend using Cool White behind colored lenses, as the colors will not be true. For use behind colored (e.g., red, green, bi-color, tri-color) lenses please see our warm white version ILTW1157-SMW

Features & Benefits:

  • High output SMD LEDs
  • Exceeds COLREG 3nm visibility requirements
  • Meets visibility requirements for vessels up to 20m
  • Constant-current drive topology
  • Over-voltage protection
  • Thermally efficient design

Important Notice:

Navigation lights are tested and approved as a fixture with the original equipment source (bulb) already installed. The operator of vessel assumes all liability when using this product as a replacement for the original approved light source. The use of this LED light source in individual navigation fixtures has not been evaluated for compliance to USCG, COLREG, or any other navigational lighting standards or regulations.


  • Fits Socket: BAY15d (double contact, offset pins)
  • Typical Applications: Masthead, stern light
  • Dimensions: 1.1" (28mm) Diam. x 1.57" (40mm) + socket
  • Input Voltage: 10-30VDC
  • Power (Watts): 3.0W
  • Current Draw: 250maA/12V
  • 125mA/24V
  • LED Emitting Color: Cool White
  • LED Type/Quantity: 18 x SMD
  • Beam Angle (FWHM): 120° (five directions)
  • 360° pattern
  • Light Output (Lumens): 240 lumens
  • Warranty: 2 Years


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