I replaced mine with an LED type. Got it from yachtlights.com. Fit right in and it is sealed so no more corossion issues. I put in a blue one - you don't need that light with your all-around white light. Plus my dinghy blocks it anyways. The blue is nice to leave on at night if you are out on a dinghy.
Answers
PC BYC, Holland, MI
Boat Name: King Kong
"Boat + Water = Fun"
http://www.attwoodmarine.com/store/product/6556
Go Steelers!!!