The ThorFire 847 Lumens Tactical LED Flashlight has 4 brightness levels, Moonlight/Low/Mid/High from 0.5 – 847LM. The Cree XM-L2 LED with a lifespan of 20+ years of run time. It has a Tactical switch for momentary-on without making a sound. Drawback is not convenient to change modes but Mode Memory makes it up. Made of Aircraft quality aluminum body structure and Waterproof to IPX-8 standards.