SemiLEDs is the manufacturer and they are an American based co, but manufactured in Taiwan, FWIW.

The problem I see with these LED's is mainly efficiency. The highly efficient Cree XRE and XPG emitters would blow away lumen/watt efficiency of the high wattage emitters in this system. I think they use a combo of 50w LED's and 3w LED's from what I remember from the RC posts.

That's probably being picky, though. It still seems to put out lots of light. Check out youtube videos also. If you only need one or two of these, then the hit in efficiency may not be too big a deal. I don't know about the quality of the emitters, but doubt its up there with Cree, Luxeon, and SSC ...

As far as what happens if/when they break, I don't know that either. You could probably swap in emitters as they fry.

I'd rather DIY a quality setup