I think M8 is made by same OEM manufacturer as Hank’s.
UI is quite simple, similar to D4 v2 Ramping UI.
one press ON, one press OFF
press & hold- RAMP
2x press- turbo
3X PRESS- SOS
4X PRESS- TURBO MOMENTARY
6X PRESS- LOCKOUT
8X PRESS- BEACON
About 0.72 times of D1s lux value for my 3m test. Not going to supply the measured values as I suspect my readings are on the high side for my GM1020 meter.
BG's listing says 800 meters, which, doing the math, is 160 kcd. For a 54 mm head diam and true FET driver, I suppose this could be possible.
I got the M8, D1, and D1S all on the way, but may be a little while yet.
From the pic above, though the M8's head is wider, looks like the reflector I.D.'s might be about the same - the M8's bezel setup looks wasteful on reflector width.
As freeme measured, maybe the M8 is not a true FET, or is using thin LED wires and poorer performing springs, or could be just the difference between a XPL vs. a XPL HI. Hank's Emisar lights use the great performing Beryllium copper springs, here: http://intl-outdoor.com/gold-plated-beryllium-copper-spring-5-pcs-p-831.html, shown with djozz's spring test results.
Received mine today - came on one of those green plastic padded cases, cheap but ok. Spare lens, USB cable, lanyard., o-rings.
it's a 4000K XPL HI LED - did not expect that...
I know it's a 4000K because today I also received a D1S from Neal with a XPL HI V2 5D 4000K and they match tint pretty much exactly.
The UI may be a V1 Emisar - last used level is not remembered, so from OFF, a single click always starts at lowest. The 3X click is battery voltage, not SOS as noted earlier.
The ramping is klunky - not consistent, and intensity of the hot spot is not as bright as the D1S, but it could be the battery I used.
The 26650 battery tube is too narrow - one LK 5000 cell I tried will not fit, but fits a Manker U21 perfectly. I popped in a EVVA protected I had laying around, fits but it's tight, but the length is another problem - partially crushed the + cap on the EVVA.
On the M8 there is a switch LED, blue, but it goes on when the light is ON, OFF when the light is OFF.
The M8 is a slightly smaller carry light than a U21, but quite a bit bigger than a D1S. Reflector ID appears to be bout the same as the D1S because the M8 has a wastefully wide bezel, though it's a nice chunk of SS.