No.. but you have different issues with flashlights..
1) proper circuit design that does not drain the battery over time
2) Proper milling and annodization that does not cause draining, or oxidation buildup and bad connections.
3) Proper heat sinking and damage to LED due to heat.
Now.. that's not to say you can't have a cheap ultrafire/dx light that does have it.. but you might not get what you want/need by just buying from a "catalog" and hoping.. I've bought MANY dx lights.. some bad, some ok, some great. But they were a crap shoot. Also the "UI" of the light is very important for a weapon light.. one that you can SET and STAY in the mode you want, not one that changes if you flick it on/off for a split second.. 90% of the lights from DX have a user interface that will change the settings when you don't want it to (in a weapon's use scenario) the one you describe that you change by "quick click" is not what you want from a weapons light perspective.. you want a simple twist high/low that you can do while it's mounted with gross motor skills.
Not sure if the issues are worth considering for the OP based on his use..