I was just selected for collateral duties in Executive Protection at my agency. I was in training this week and the instructor recommended that we always have a flashlight with us while working. The normal issued light for uniform duty is a Streamlight LED Stinger. Needless to say, that is too big while wearing a suit. Are there any super small 18650 lights that would work? Or, should I look at something that runs on a 123 battery? I am also sure that the future training will include shooting our Glock 17 or 19 while holding what ever light we select.