LED bulb replacement vs complete unit for tri color/anchor light

[redpointist]

So I climbed up the mast for the first time this weekend! Rigging looks good, but the lights and mast wiring need to be redone.

There was an aqua signal 25 steaming/spreader light whose plastic lens had basically dissentigrated and was opaque. If I got a new unit just like it, which appears to still be manufactured, how long would you expect the lens to last? It doesn't look like anyone makes mast lights with glass lenses anyways.

At the top of the mast was some kind of tri color/anchor/strobe light that looks like it as made by the Guest corporation. The lens on it had clouded and was opaque as well, and plastic 2 screws holding it together basically fell apart so I ripped it out too.

So the question I'm left with is whether to get new sealed LED units, or get incandescents and swap the bulb for LED. It looks like the new LED units are not user serviceable and if something goes wrong with it you end up having to toss the whole thing, whereas if I get an incandescent housing and put an LED bulb in it, I'll just have to replace the bulb if the LED chip gets fried somehow. I'm not too worried about USCG certifications and such as long as the light performs in practice. I'm mostly concerned with cost and reliability.

Are these sealed LED units reliable enough to not worry, or are there any user serviceable ones? Or would I be better off getting some LED replacement bulbs?