Technically, if you can see a flashlight shining at you from any distance, even from miles away, it means that light photons are spanning the distance. This brings us back to this very subjective area of what's actually, practical and usable in various scenarios.
It's pretty hard to see a person in subdued clothing standing still against a treeline at 300 yards in plain view with a 25W HID and 1800 focused lumens. Reduce the size of the target to a groundhog standing still at that distance and it's highly doubtful you'd ever recognize it as a groudhog. Reduce the lumens down to 1/5, and lose the HID's advantage of higher surface brightness in exchange for a relatively floody LED and you don't have a chance of seeing anything anything out there. In fact, the floodyness is actually a hindrance because it illuminates the foreground which reduces the eye's ability to see more faint and distant objects. The DEFT is the only LED light that can approach the 300 yard mark and still be relatively useful on objects as small as what we're talking about. The SR90 will not accomplish this. Yes, it produces a lot of lumens but it's not going to be as bright as the DEFT in measured lux.
Windstrings, don't you have a DEFT? Give us some 100+ yard beamshots next to your SR90 if you get the chance.