Streamlight Protac 2.0, Headlamp, Rechargeable, 2,000 Lumens, Anodized Finish, Black, Includes SL-B50 Battery Pack and USB-C Charging Cable 89001 The high-performance ProTac 2.0 Headlamp produces 2"000 lumens without sacrificing run time. Powered by the new SL-B50 battery pack that charges inside or outside of the light using a USB-C cord.