Yea Gods!... I can't believe I did that. Thanks for the catch. Fixed!
Your shout Match. Scotch thanks. 
You guys are slowly teaching an old bugger new tricks.
Thanks, Match!
texaspyro we’re waiting for you to do something nutso with those emitters. Something with heat pipes and the stirling cycle.
The 20mm ones are going into a couple of these… nothing spectacular: Intl-Outdoor USB Device Charger XM-L T6 Flashlight
16mm into a SRK.
Nice! Thanks for putting in the time for these measurements, they provide some very useful information.
Looks like the old table was in fact quite far off and the Vf is a lot lower than I was thinking. My worries about using the XML-2 + 1 lithium cell + linear driver are not a big deal anymore as I don’t plan on running more than 3amps.
Can someone post a graph with both XM-L and XM-L2 on it for direct comparison?
-Garry