Streamlight TLR 1 vs Surefire X300 Round 3: Battery Life Both systems use two CR 123 batteries. The Surefire 800 lumen HL models lasts 1.75 hours, and the standard 300 Lumen models lasts 2.5 hours. The X300 runs for 1.5 hours at full power and drops down to 50 lumens until the battery...