XTAR TZ20 Cree XM-L U2 Mode DIY Tactical LED Flashlight 50,000 hours lifespan Cree XM-L U2 LED Max output 820 lumens Tactical tailcap switch with memory function OP textured reflector, throws beam over 175 meters Creative design, with 5 Low10%, Mid40%, High100%, Strobe, SOS mode, can cancel or recover Mid, Low, Strobe, SOS mode at will.