when you say "LED fixture", do you want something that the led bulb is firmly attached to so it can never be changed without replacing the entire fixture?.... these are available, but very expensive and not as well built as you would think they should be for the price.
a new "common" fixture with a replaceable bulb is a much better option. and it is NOT jury rigging it, but it is the norm for this type of application.
if the fixture you have is still water tight and dry with a clear lens, you could probably use it, but if you want to replace it, do it!....
i would recommend that whatever you decide to do, make any wire connections with adhesive shrink terminals (which is the very best), OR.. dip the ends of the wire in silicone grease before crimping them into regular connectors.
AND, use silicone grease in the bulb socket. this will keep the moisture out and prevent corrosion and then a faulty circuit....
silicone grease is dielectric and will not conduct electricity, where as a regular mineral grease can... not enough to create a short in the system, but enough to cause a very small measurable draw, depending on the atmosphere.
dont allow the wire to hang from the masthead to the deck from a crimped terminal, UNLESS it is an adhesive shrink terminal. this will help prevent the wire from coming disconnected and falling to the bottom of the mast inside...
AND, make sure there is a decent strain relief so the light fixture never has to suffer from pulled wires.
this is what i installed on my 25.... it is a very bright single led designed for the masthead. its built with a reflector to turn the light out, but its so bright that it very clearly lights the windex....
previously installed was a sun baked fixture with an incandescent bulb in it that was mounted on a bracket similar to the windex bracket that left the top of the masthead open.
and there was no strain relief on the wire... it hung from the fixture to the deck. im surprised it was still attached and working after all these years.
when I pulled the wire to install the silencers on the wire, there was a dead bird in there. (it must have been hung up on the spreader bolt)
so to prevent that from ever happening again I built a different mount for the light to enclose the masthead, and with a better strain relief for the wire.
I installed twin wire with a sheath for better tensile strength, not that it was so necessary, but only because I had the wire and i could...
masthead light fixture Victory #AA00106 anchorlight (perko 337)....my cost was $12.95
masthead bulb LED, brand, DrLED #GE90STAR ........................my cost was $49.00
