I'm guessing that since you were only getting 667 mA. out of the LED lead(s) that the board itself might be faulty.... or you could've wired the transistor backwards. I could be wrong though, as I'm just guessing.
Other than that the wiring set up looks like it would work. I think that I'll try it out and see if it works, and then tell you whether or not it works on my board.
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