Yes, that's the ANSI output measurement in lumens.
Look at Selfbuilt's test and data for the SR90 below:
http://www.candlepowerforums.com/vb/showthread.php?272521-Olight-SR90-Intimidator-(Phlatlight-SST-90)-Review-BEAMSHOTS-RUNTIMES-and-more!
More importantly, look at his more recent [newer] data for the SR90 in the table below, also from Selfbuilt.
Notice how it says that the estimated lightbox lumens is about 1400 lumens.
It is
estimated because the SR90's head is too big to fit into his light box or sphere.
Also notice how his maximum lux measurement is 100,500 lux, which extrapolates to 634 meters of throw until the brightness falls to 0.25 lux.
So yes, the data is somewhat different [and lower] than the manufacturers claims.
The data will vary a little from lux meter to lux meter; you didn't think two different lux meters would give identical readings did you?
The lumen measurement will give you an idea of the SR90's overall output.
The lux measurement will give you an idea of the SR90's maximum intensity of it's hotspot, hence longitudingal throw.
The white wall shots will give you an idea of the SR90's
lateral beam spread - the wider the lateral surface area of illumination, the better; unless you are a hunter/sniper trying to do a covert operation, illuminating the target only, and trying not alert all the enemy.
You will find that the SR90's longitudinal performance/throw is excellent.
However, it's lateral performance/flood/spill is inferior to the Fenix TK70 Triple XM-L, for example.
The total output in lumens is made of the brightness in lux [which also determines the longitudinal throw], multiplied by the lateral surface area of illumination in square meters.
Look at HKJ's photos below for a rough idea of the
lateral beam performance.
The first photo is the SR90.
The second photo is the TK70.
Unfortunately, the photo has not captured the full width of the spill in either light.
The camera would have to be positioned further back to capture the spill.
Thus, flashlights are not all about longitudinal throw, they are also about lateral flood/spill as well.
This lateral spill/flood is very difficult to measure quantitatively/objectively and document - and in fact, is not documented on the spec sheets at all.
SR90
TK70
Notice the width of the hotspot, and the brightness of the lateral spill in the foreground.
The TK70 has 2200 lumens OTF...