I actually had the same thought about the single strings, but now my mind is traveling 10 miles a minute. Is it possible to add multiple strings to each area to create more colors, like red + blue = purple? Or what about using a "fade" controller to adjust the brightness with the color-changing string?  How many strings can connect together and what's needed to do this for use with only 1 controller?

Right now I'm just in the planning stage since I too don't even own the set yet. But this is something that I will do eventually because I love how they make the Ice Sculptures at winter festivals light up and even change colors, and this is truly a set that would look great like this. So I'm gathering as much tips, advice, and figuring costs (especially now with the holiday season fast approaching) to get to a final result that I can be happy with. I'm sure it'll be after the New Year before I start working on this and any input that you have about lighting it up would be greatly appreciated.

I can understand the lack of interest for a true light kit for this specific set and definitely respect the sets and small kits that you do design, and couldn't agree more with your decision. I thank you for your ideas and any tips about what is possible with connections with the smaller kits would help out greatly, not just for this set, but for anything I might try to tackle with lighting ideas.