Use Cree XML led, 5pcs,Brightess:4500LM.8.4V~12V, 3 x 26650battery, 3 x 18650 battery, or 2 x 26650 batteries (not included). Brand:TrustFireModel:TR-J12Emitter Brand:CreeLED Type:XM-LBIN:T6Color:WhiteNumber of Emitters:5Voltage Input:8.4~18VBattery Configuration:3 x 26650 / 3 x 18650 / 2 x 26650 batteries (not included)Circuitry:Digital Regulated 7.5A Current OutputBrightness:4500LMRuntime:80 ...