As we get older, we don't want to have to climb up a ladder every year to install our lights, and so we were happy to find these permanent light solution at an affordable cost. The only downside is that I had to split one of my sets, and in order to do that I had to get a new controller box but they don't sell that separately. so when you order, make sure you order the right amount and don't plan on splitting the set up.
I contacted govee to ask about extension to run lights from 1st story to second and they said they do not sell them. Having lights run up a floor would make for a ugly installation.