I'd really like to know what you are defining as PUR? Seeing as its an application specific measurement, I'd like to know what wavelength ranges you use and what bias weighting you use for the different wavelength ranges to get a PUR measurement? You mention PUR at every corner, but you have yet to define exactly what it is. Don't give us the typical definition of "photosynthetic usable radiation". We need details.
And is it just me, or do these guys sound like they found some new alien LED technology that far surpasses CREE leds and the like? I mean, how much better could these things be? They are just LEDs with a driver, in a little heatsinked package, right?