I can't remember where I saw it, but I read a super long thread about a guy who remodeled his house so that he could light his reef tank with Solar Tubes, from the pics, he had great color and awesome growth, but it's not something that works well in our area...He was in Nevada or Arizona or New Mexico, one of those three states, I think....
It's been a couple of years and many, umm, yeah, so the memory aint too great LOL