Aimkon HiLight R20 HiLight 600 Lumen LED Tactical Flashlight with Smart Pressure Switch and Quick Detachable Rifle Mount, Black Max 600 lumen output with CREE XM-L2 LED powered by 2x CR123 batteries (included) Outputs: Max 600 lm, med 300 lm, low 60 lm, and strobe 600 lm Integrated Quick Detachable (QD) Rail Mount Smart Pressure Switch Allows Light Stays On or Momentarily On Max runtime: 50 hours; Waterproof: IPX-8 standard