For a city, it really helps to solve a number of our problems.
We're finding it brings temperatures down on a roof from 160 to about 80 degrees in the summer.
We're monitoring the equipment. As soon as that's done and the weather breaks, we'll be up there.
We don't know (how much power they'll generate), because it's a test, these are the first of their kind in the world. If it works we'll expand it ... to as many buildings as we can.