Got my Raw Ns XR-E today. Very impressive. Simple lux meter reflection tests indicate output is roughly TWICE my HDS U60, which is supposedly calibrated to 60 lumens during manufacturing. Conservatively, that puts the Ns XR-E well over 100 lumens on high.
Didn't do a comprehensive run time test, but if current is 700 mA, and the 14250's capacity is about 300 mAh, maybe 15 min? I did some rudimentary timed tests with a lux meter, which showed it reaches 50% output in about 8-10 minutes, so run time will be pretty short.
Low appears roughly equal to my HDS U60 on level 8, which is about 5 lumens. Theoretical run time on low would be 30+ hrs, assuming 8-10 mA drive current.
Starting with a freshly charged battery, the Ns XR-E gets quite hot if left on high a few minutes, even hotter than my Fire~FlyIII on burst mode. That's OK for brief use, and the low is really sufficient for many activities. But if you leave it running on high in "candle mode" sitting on a table, then pick it up after several minutes, it will be hot.
Beam pattern is a nice mix of central spot and bright surrounding flood. A few very faint ring-like artifacts if scrutinizing against a white wall. Tint seems very white.
Considering the Ns XR-E is about 1/4 the volume of an HDS U60, and about 1/2 the volume of the tiny Fire~FlyIII (pocket body), puts out nearly 2x the light (albeit for a short run time) that's pretty good.
The main drawback is a short running time, but that's no different from other super-high-output small lights. Using "low" output and saving "high" for brief periods makes it more practical.
The CR2-powered regular Raw XR-E with three output levels seems a more general-purpose light from a run time/brightness standpoint. However the Ns is smaller. If you want the smallest possible light with the greatest possible output, the Ns XR-E is it. Personally I would have preferred backing down the "high" level drive current to about 500 mA or so, which would have given the Ns a little more utility.