here's a diagram of how I think LED
based moonlights could be constructed, in a manner which might survive saltwater for a good while.
all the parts you need for this can be had from www.bgmicro.com
- i've ordered several times, always gotten great service.
they sell both blue leds and UV
leds ... a combination might give you great effects on some of those fluorescent critters that live in saltwater.
check out the BIG 10mm high brightness led
- it's large size makes it easier to mount and work with, plus it packs a big punch.
I didn't put in how much resistance you use, since it depends on the bulb you choose and how big a power supply you're using... I'd be happy to help on a case by case basis as much as I can - although it's been a while since i've done any circuits
Here's the diagram and some more comments:
- Added an additonal diagram with comments on wiring.