Just a reminder for boats registered in certain nations putting an LED light bulb into a regular navigation light socket it looses its certification (BSH or Wheel) which might get one in trouble. We replaced our Aqua Signal Tricolor/Anchor/Flash Light with a Series 34 Tricolor Anchor light and it did fit the existing socket. The hint with the obstruction is something I will have to check next time up there. -- Michael & Robyn