This is a great item. I love how easy it is to light up buildings. Get this hub, and you can light up two. The bad part is, the lines are only 24 long. The good news is, they make 48 long extensions. And you can dim or brighten the light the shade you want. Of course, if you have more items to light up, you get their extension hub. And can hookup an ON/OFF switch to it as well. Each building would require one of the 4 ports. However, if you purchase street lights, they are 3 street lights connected together, to use one port. Before purchase, go to YOU TUBE and search on JUST PLUG, and watch the ones produced by Woodland Scenics.