Based on some of these initial impressions, I'm still wondering if Zebralight is
really delivering a 93-95CRI light at the stated output.
Cree sells bins of XHP50s that are 5000K.... and ones that are 90+CRI... and ones that are >1000 lumens... but I don't see any bins on their website that can do ALL THREE specs at the same time. Maybe I don't get how it works, though:
http://www.cree.com/~/media/Files/C...d-Modules/XLamp/Data-and-Binning/ds-XHP50.pdf
You've already expressed your skepticism before, and it's already been answered before. The luminous flux outputs stated in the datasheet are a reference at a set current, just for a comparison between different binned emitters at the same benchmark current.
When you drive the led emitter at a higher current, MORE LUMENS come out the front! (Who'd'a thunk it!)
So the stated test conditions for the results in the datasheet are:
"Binning condition: TJ = 85 °C; 12 V, IF = 700 mA
Reference condition: TJ = 85 °C; 6 V, IF = 1400 mA"
So the reference output is when the emitter is run at 1.4A.
But you can run the emitter at 3A or even higher, if your cooling is good enough. And the output increases accordingly.
See page 13 of the datasheet you linked to, and look at the charts. You see that you'd be getting about 190% of the rated output if you are running the emitter at 3A rather than 1.4A.
So there is no reason to impugn the validity of the claims made by Zebralight. Their track record is pretty solid.
See this chart, and have a play around yourself with the Cree Product Characterization Tool:
http://pct.cree.com/dt/index.html