The Elos e-Power light system - see Page 5 in this thread - will shortly be up for sale. I am using the center LED module. Anyone building a sans canopy system (and hasn't finished the wall behind the tank) this lighting is a excellent opportunity to truly hide the cords. It uses a projector arm to hold the light off the wall. Looked sleek and modern when installed. Alas, my new tank is 27" tall (stand seemed to grow during the build too). So I needed to go with a slimmer design. PM me for interest. You can take delivery of the light / ballasts now and I can then give you the LED module in few weeks if you're in construction mode.
I'm looking to get $600 for system (light, projector arm, LED center module, ballasts). I do have hardware to hang this in a traditional manner and then you get the unmitigated joy of hiding the infernal cords.