Ok! but.. why the tube so tall? If you make them something like 2 m tall, you will have less visual impact and low light dispersion! (and maybe Belle Arti Italian Institute will give you the OK!!)
1. The pipes need to be just as tall as it is right now to clear the red-roofed building and get exposed to the morning sun.
2. As I said, since the visual impact is intentional, it would rather be something. At 2 m would fall into ambiguity visually.