With 2,200 lumens of blinding light, the ProTac HL4 is the brightest addition to the ProTac series. The ProTac HL4 offers powerful LED technology and three different userselectable programs. The light will accept two battery types, four CR123A batteries or two Streamlight 18650 Li Ion rechargeable batteries. The output from the C4 LED results in one of the brightest tactical lights available. The "sure grip rubber sleeve" and included lanyard ensures you'll never lose your grip.