Streamlight ProTac Rail Mount HP-X Pro, 800 Lumens, 105,000 Candela, Black, Includes M-LOK Mount, and (2) CR123A Batteries 89017 Get extreme beam reach with 105,000 candela! The multi-fuel ProTac Rail Mount HP-X Pro shines far and bright, penetrating smoke, fog, and photonic barriers. Its Jack-Cap tail cap switch offers operational switch redundancy with both push-button operation or remote pressure switch operation.