I just saw you once carried the Smoke Cutter and 3/4 cell Maglites, hence why I asked if you had been LEO at one point.
The beam of the ProTac EMS was/is not a hit at all. Supposedly it was some kind of thing where it was made to check pupil reaction. Mine would turn off it the tail cap was even the slightest bit loosened and the o'ring is thin enough to not offer much resistance so it loosened easily. I put a wee bit of foil over the threads to aid in resistance and add contact area for the circuit so if it did twist some it still works.
The beam of the ProTac EMS was/is not a hit at all. Supposedly it was some kind of thing where it was made to check pupil reaction. Mine would turn off it the tail cap was even the slightest bit loosened and the o'ring is thin enough to not offer much resistance so it loosened easily. I put a wee bit of foil over the threads to aid in resistance and add contact area for the circuit so if it did twist some it still works.