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Hopefully all you need to know... regardless of make. Key tip = get a multimeter ;)

https://www.youtube.com/watch?v=wemK6SD0Imo

Had the same question myself... After a lot of searching, i went straight to the source and got lucky!

http://www.luxeonstar.com/blue-470nm-sinkpad-ii-20mm-tri-star-led-70lm

Halfway down the...