So this past weekend I made some progress on my LED setup in my boat. I still have some more to do, but I was able to get the 4 main cabin speakers and the courtesy lights (including the damn sealed factory supra pucks between the speakers) all setup with blue LEDs. The factory courtesy lights were white.
I still plan to get the front speaker rings on, as well as the front and rear vents done. I might also do under the swim platform later.
My boat came from the factory with courtesy lights. The pucks between the speakers had white LED's in them, and below the seats were white LED's as well. I just replaced those. As for the speaker rings in the boat, I just wired them in with the pucks between them. The rings on the tower and the lights in the sub box were wired in to the switch that was already there for tower lights. I don't currently have any tower lights, but that is the circuit they are on.
I got mine from superbrightleds.com and I had the interior rings custom made. I have 6 rings that I had on my old boat that did not fit in this one so I might be selling them if you are interested. You would only need to buy the LED strips and wire them up.