Thanks to you, David.
I tested it for a few minutes over the 45 gallon and my wife seemed happy with the level of blue, so I'm one step closer to switching away from flourescent.
Now all I have to do is some plumbing and make that decision on whether or not to rip up part of the carpet in the basement and put in some wood flooring under where the tank will be... Because once it's up, I'm not draining the tank to make flooring changes... I'd almost rather build-in the tank...