Streamlight's compact ProTac HL Professional Tactical Light is a lightweight, programmable flashlight that emits a high-power 600-lumen beam, visible at 253 meters at its highest setting. It incorporates intuitive Ten-Tap programming to adjust between three settings, each of which produces a different level of light. The high setting emits the 600-lumen heavy-duty beam, but the flashlight can be set to a 33-lumen level, which has an 18-hour runtime. C4 LED technology provides maximum illumination for any situation, and is shock-resistant as well. This compact model also features a push-button switch at the tail and an anti-roll head, making one-handed operation simple. The aluminum construction and o-ring sealed glass lens are ultra-durable, and come with a removable pocket clip and nylon holster for easy carry.