Sorry guys, I just noticed a very significant flaw in my logic. It's a really silly goof.

I've been thinking about the possibility of White LEDs as grow lights, which seems reasonable if one looks at the activity spectra of Green Plant Photosynthesis and compares it to the emission spectra of most White LEDs. They are quite similar, with peaks in roughly the same places.

As such, I goofed and substituted lumen ratings using the data for the white Cree XR-E lamp in the calculations for the light output of the Procyon 100's. And of course, the Procyon's use the Colored Xlamps, and they have different specs, and different lumen ratings.

Brownthumb, I know what lumens are, they're the SI unit of luminous flux, equal to 1 candela * steradian. But what do you mean by PAR? Do you mean Photosynthetically Active Radiation? Or something else? PAR is used as name for too many things in lighting

As for what my goof implies about the numbers, I think it means that the lumen numbers are far too large, which seems astonishing. Trouble is, I'm reading through Cree's spec sheets, and they don't specify lumen output at high driving current for the color parts, just at the relatively pedestrian 350mA.

I'm currently working on researching more and trying to post revised calculations.

Hmm, based on most specs, the lumen output seems to double when going from 350ma to 700ma with minimal increase when going up from 700ma to 1000ma.