Mine also has no flicker on firefly. Did you try to clean all the contacts in the tail(cap)?
No, it is not a bad luck. The statistic shows that the Armytek products faults are normal behavior. If somebody have one or three of the Armytek products and they works fine this is not prove their reliability (that is too small statistical sample). But if you search in CPF for the problems this will give you more realistic view of their products quality (the problems are too much compared with their competitors). Armytek problems with even simple things as the user manuals make me to realize that it is not worth to take a risk with their products. There are more reliable and responsible brands which to prefer.That's bad luck..... please let us know how Armytek take care of this.
My overal preference is for their standard (not pro) line as the UI is easier and I think there is less
to go wrong. Too bad they don't offer the XHP-50 in standard. That said I like this light.
I would suspect that internally they are identical. Just programmed differently. A lot cheaper than operating two different assembly lines. And a lot cheaper than buying smaller quantities of different components. A very common practice.
To run with a 18650 cell the driver must have a DC boost driver to increase the voltage from the nominal 3.6 to approx. 5.7 (required forward voltage for the XHP50).The pro models offer constant output at the lower turbo mode; the regular model doesn't. My guess: the pros have buck/boost drivers, which have more components and are more expensive, whereas the regulars have buck drivers that are less expensive.
To run with a 18650 cell the driver must have a DC boost driver to increase the voltage from the nominal 3.6 to approx. 5.7 (required forward voltage for the XHP50)