I thought it would be worth mentioning that the savings on these overseas lights extends to the DIY market too. If you are handy with a solder iron you can build custom fixtures to fit any tank at a fraction of the cost.
I purchased a Bridgelux 16 emitter kit, heat sink, pots, wire and two dimmable drivers for $110 shipped. Everything needed to build a kick ass led fixture.
Http://aquastyleonline.com