This is what I did:
I used the tristar setup, http://shop.stevesleds.com/3-up-Tris...-AntiDisco.htm because I was lazy and didn't want to solder that many single stars together. It's a little more expensive, but saves time with drilling holes in the heatsink and there's less stars to solder. As you can see, I have two tristars with all 660nm reds and one tristar with 2 reds and 1 royal blue. The single led on the bottom is a true violet (peak at 403nm) I had lying around. I wanted to see if violet will make a noticeable difference with regards to growth. They are wired in a series with a total forward voltage of 22.25v. They are powered by an inventronics 40w driver delivering 700ma that is manually dimmed to around 500ma. I dimmed it because I've read the true violet led does not last long at 700ma.
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