I just bought the new Streamlight Protac HL. This is an incredible tactical light. With an output of 600 lumens (that's 600, not 60), it rivals most lights five times it's size. It has the "Tap 10" programming, so you can customize functions (High, low, strobe output). Operates on 2 of the CR123 lithium cells used by most other similar lights and had the latest generation C4 LED module; also waterproof according to packaging. Only drawback is a battery life of 1.5 hrs, undoubtedly due to its incredible light output. Highly recommended to all LEO's or other first responders. Makes an incredible tactical flashlight for most anyone, for that matter. Seriously the brightest tactical light I've seen.