Ive been using these lights for about three years now and have been more than impressed with them. I've gone swimming with them and have used them as dive lights at a depth of 20 feet which is hard on something that isn't meant to be in water. The ones I have are the 180 lm models but they are now up to 275 lms. I know that tactical lighting is a sticking issue for some people but it bears noting that if I'm promoting something it's because I've used it and believe in it. The Streamlight Protac 1L is a great light that should be considered as a T1C pocket light.
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