REIN 3.0 is by far, the most powerful and most configurable weapon light ever made. With an upgraded electrical system, it brings you more capability. Nothing comes close. Delivering the power you need, in a small package. Everything you want it to be. Output Specs & Features: 100,000 Candela peak beam intensity (With 18650) 1250 Lumens output (With 18650) 95 minutes run-time (With 18650) Dual-Fuel capability. REIN 3.0 runs on 18650 and now, can also run on two CR123 batteries. 18650 rechargeable battery provides the best output, by far. However, you can now use 2 CR123 batteries if needed. You will see reduced output with CR123 batteries. 1.3" Bezel diameter - smaller than the original REIN in diameter. 6.17" Long - a very compact full-size light. The same reduced mounting lug height as the REIN 2.0. Shorter than the original REIN 1.0 allowing for tighter mounting.