Streamlight ProTac Rail Mount HL-X Weapon Light - The ProTac Rail Mount HL-X is a 1,000 lumen weapon-mounted light featuring a fixed mount for MIL-STD-1913 (Picatinny) rails. It uses either a remote pressure switch or a standard push-button tail cap switch, and can run on multiple battery types. TEN-TAP programming allows for selection of three different operating programs: 1) high/strobe 2) high only 3) low/high High: 1,000 lumens; 332m beam distance; 27,600 candela; runs 1.33 hours (CR123A); runs 1.5 hours (SL-B26); Low: 60 lumens; 80m beam distance; 1,600 candela; runs 20 hours (CR123A); runs 23 hours (SL-B26); Strobe: runs 2.5 hours (CR123A); runs 3.25 hours (SL-B26); ; Multi-Fuel: Uses one (1) Streamlight SL-B26 protected Li-Ion USB rechargeable battery pack; also accepts two (2) CR123A lithium batteries; Includes remote pressure switch, push-button tail cap switch, remote retaining clips, double-sided tape, zip ties, and M-LOK mount; Integrated rail clamp attaches to MIL-STD-1913 (Picatinny) rails Easy to attach, secure mounting; ; Durable, anodized aluminum construction with impact-resistant tempered glass lens; IP67-rated with standard push-button switch installed (waterproof to 1 meter for 30 minutes); IP54-rated with remote pressure switch installed (water-resistant); Limited lifetime warranty;