After 6 years, I finally had to break down and purchase a new Streamlight® ProTac® HL 4. I purchased my first Streamlight® while working clubs and concert venues. It has for sure been torture-tested. It has fallen off buildings and stages; been run over by police vehicles; dropped on concrete, in a fountain, in mud, in saltwater; and has served me the past four years in a law enforcement capacity.
It has broken windows, was dropped in a pond, used as a door knocker, door stop, and more. Six years later, it has simply seen the end of its life. This light should cost three times as much as I paid for something of this quality.
I am completely blown away by the durability of your lights. For the rest of my career, you can guarantee that I will forever have a Streamlight on my belt!