This is beautiful! My daughter was asking me the other day about building a lighthouse, and I told her that would be neat, but I wasn't sure how the sloping cone shape would render. This looks really good; now we will have to build one ourselves!
Alright! Now this is the real thing. Everything is as it should be on a real lighthouse. There is one small detail you should've added. You should've made the rotating light instead of a still one but all in all great stuff!