For those who would like to know...
Using a DMM I come up with the following power consumption at various modes on a Pro V2 Warm...
OFF: ~0.0008W
FF1: ~0.0024W
FF2: ~0.02W
FF3: ~0.06W
MM1: ~0.4W
MM2: ~1.1W
MM3: ~2.8W
MAX: ~10W
I'm only bothering to include the figures for losses to cell and contact resistance for the higher modes, as that is pretty minuscule for other modes.
So... If we use cree's product characterization tool for a T6 bin emitter, apply some educated extrapolation and make some semi-reasonable assumptions about driver efficiency, TIR optic efficiency, I figure on the following:
FF1: If we assume 50% driver efficiency X 85% transmission efficiency and the emitter at ~20C, that's ~0.19 lumen OTF for ~6 months on an NCR18650B.
FF2: If we assume 75% driver efficiency X 85% transmission efficiency and the emitter at ~20C, that's ~2.2 lumen OTF for ~27.5 days on an NCR18650B.
FF3: If we assume 90% driver efficiency X 85% transmission efficiency and the emitter at ~20C, that's ~8 lumen OTF for ~8.5 days on an NCR18650B.
MM1: If we assume 95% driver efficiency X 85% transmission efficiency and the emitter at ~25C, that's ~55 lumen OTF for ~31.5 hours on an NCR18650B.
MM2: If we assume 95% driver efficiency X 85% transmission efficiency and the emitter at ~30C, that's ~145 lumen OTF for ~11.5 hours on an NCR18650B.
MM3 :If we assume 95% driver efficiency X 85% transmission efficiency and the emitter at ~40C, that's ~325 lumen OTF for ~4.4 hours on an NCR18650B.
MAX: If we assume 90% driver efficiency X 85% transmission efficiency and the emitter at ~60C, that's ~765 lumen OTF for ~1.1 hour on an NCR18650B.
I did a runtime test on MM3 and the light reverted to FF1 mode at 4 hours and 30 minutes. Cell was at 3.06V when removed. (started at 4.19V).
[edit in]: I did a runtime test on MM2 and the light reverted to FF1 mode at 11 hours and 20 minutes. Cell was at 3.06V when removed. (started at 4.18V).
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[edit in]
Wish FF3 were closer to specified output/runtime than actual. (~15 lumen)
MM2 and MM3 are both likely a little less bright than claimed, but both achieve longer runtime than claimed by nice margins. For my use, this is actually superior to the original specifications, so I'm fine with this.
MAX mode output and runtime claims seem optimistic to me, but there's a lot of room for discrepancy here depending on optical and electrical efficiency. If the TIR employed is closer to 90% efficient, and they are managing 95% electrical efficiency in this mode, then 900+ lumen OTF is possible here with a good LED sample, albeit, unlikely.