Streamlight's ProTac HL, a high lumen lithium powered flashlight that delivers 600 lumens and 16,000 candela peak beam intensity, combines small size and programmability. This enables users to select among three programs to suit their preference or operating needs: high/strobe/low (the factory default setting); high only; or low/high. It provides a run time of one hour and 15 minutes on the high setting and 18 hours on the low setting. The flashlight measures 5.40" in length and weighs 5.6 oz.