A new twist on one of the most proven weapon lights in the world the Streamlight TLR-1 HL Tactical Gun Mount Weapon Light gives you all the durability and rock-steady performance youimage expect from the TLR series but upgraded to provide a 630 lumen light output. This high-powered weapon light gives you enough illumination to carry out any search or clearance task even in total darkness. – The beam pattern of the Streamlight TLR1 HL Gun Light is made for floodlight-style illumination letting you cover a large area to assess the scene or identify a suspect quickly. Long-lasting C4 LED technology gives this compact powerful pistol light an overpowering level of output and makes it fully impervious to shock. The Streamlight TLR1 HL Light includes an integral rail grip clamp that requires no tools or gunsmithing and mounts quickly and easily without you having to pass your hand in front of the muzzle. And once mounted this rock solid mount stays exactly where you put it. – This lightweight compact high lumen lithium battery powered Gun-Mounted Tactical Light provides up to 1.25 hours of continuous run time. The Streamlight TLR1-HL has a tethered battery door and latch mechanism that prevents battery door loss while providing easy battery replacement. When enabled the strobe function is activated by two or more momentary paddle hits. – Specifications for Streamlight TLR1 HL Weapon Light: – Housing material: 6000 Series machined aircraft aluminum with black anodized finish. – Length: 3.39 in. (8.61 cm) – Width: 1.47 in. (3.73 cm) – Height: 1.44 in. (3.65 cm) – WEIGHT: 4.18 oz (118.6 grams) with batteries (included in purchase) – RUN TIME: 1.25 hours of run time to 10% output. Solid-state current regulation for consistent illumination level. – LENS: High temperature shock mounted impact resistant Boro Float glass. – LIGHT SOURCE: C4 LED technology impervious to shock with a 50000 hour lifetime. – LIGHT OUTPUT: 638 lumen output. TIR optic produces a concentrated beam with optimum peripheral illumination. – ON/OFF: Ambidextrous momentary/steady On-Off switch. Double tap of momentary paddle within 0.4 seconds activates strobe. Strobe can be disabled.