[hiccup]

Agree with above, interior lights you can just swap the bulbs and leave the fixtures alone. MarineBeam is a good outfit but I just bought my bulbs off Amazon. Cheap and easy to do, but pay attention to the color temperature. I like the warm white much better than the bright white or daylight colors.

Cockpit lights you will likely have to swap out the fixtures, lots available, make sure they're at least as big as what they're replacing so they cover the holes already there.