This would also be easy to do. You would build recesses in the hull were you wanted the lights (or have the recesses made by an outfitter of some sort) and put the lights in the recesses. Then put some sort of tough and durable and translucent material over the depression. I think you would have to use a stronger light then neon, but I am quite sure that there is something that would work. The lights would run off the boats battery and either the covering of the depression would be tinted or each light would have a lens or perhaps you could use something like neon. Anyhow, that's the idea!