Hi, i'v being thinking about this for a while and i wana see if it could be of any use. If you were to place a mirror behind your Solar tubes would the light and heat reflect of it and hit the back of your tubes causing greater heat for your tubes, it would mean no heat gets wasted just onto your roof where your tubes are. Any ideas?
It would be fun watching blinded helicopters and planes crash around your home!
The principle sounds great, I am waiting for an expert to reply to this as its a great base idea. Could also instal giant magnifying glass to focus the beam above the tubes as well, would you end with some form of perpeptual motion energy generator? I doubt it but who knows.