PowerTac X3000 LED Flashlight 3000 Lumens, Uses 3 by 18650 Rechargeable Batteries Three CREE XM-L U2 LEDs which produces an amazing 3000 Lumens The X3000's portable size makes it one of the brightest in its category User interface is seamless using a control ring to switch between the six modes including strobe LED: Three Cree XM-L U2 LEDs with a lifespan of 20+years of run time