I too have a solar tube and I'm very pleased with it. This is the second home we have installed them in and loved them. A already stated there is no heat loss or gain. They can also be installed In 2 story homes they extend the tube to the lower floor through an enclosed area. worked for me. You can also have a bulb installed with a switch to use at night, have not tried that the salesman explained it to me. would love one in all my rooms.