veggi,

I picked the Luxeon III because it has a higher luminous flux than the K2, and they both have the same wavelength (and the same supplier - Future Electronics).

Would you recomend going with the LEDEngin red at 661nm? I am still trying to wrap my head around converting between lm and mw of Luminous Flux.

Since I have your attention, would you still recomend the K2 for the blue spectrum? Or has everyone gone to LedEngin?

Thanks for your post veggi! Made me rethink some things.