First Look: Streamlight ProTac Rail Mount HP-X Pro Light

A multi-fuel long gun light with 105,000 candela.

by
posted on March 4, 2025
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Streamlight ProTac Rail Mount HP-X Pro Light

Streamlight Inc. is introducing the ProTac Rail Mount HP-X Pro long gun light, which has 800 lumens and 105,000 candela for long-range use. This new light also has a Jack-Cap tailcap switch that has both push-button or remote pressure-switch operation as well as battery versatility, allowing users to choose between two different battery types.

The low-profile ProTac Rail Mount HP-X Pro features an integrated rail clamp designed to attach to rifles, carbines and submachine guns with a MIL-STD 1913 (Picatinny) rail or an M-Lok slot using the included mount. The light is powered by either two 3-volt CR123A lithium batteries or one Streamlight SL-B26 protected lithium-ion rechargeable battery pack..

“This is Streamlight’s furthest reaching weapon-mounted light,” said Streamlight president and chief executive officer Ray Sharrah. “It’s designed for law enforcement professionals, military personnel and outdoor users when illuminating targets at a distance, conducting search operations, or performing other maneuvers under low-light conditions. Moreover, it lets users choose between using a push-button or remote pressure switch, and either rechargeable or disposable batteries.”

The new light mounts to a broad range of weapons safely and securely by means of a one-handed, snap-on-and-tighten interface that permits users to keep their hands away from the firearm's muzzle. The light’s multi-function, push-button tail switch offers momentary and latching constant-on operation; the optional remote switch is available in momentary only and momentary/latching versions. Both allow for one-handed operation of the light’s momentary, constant-on, or strobe modes. The light is also Ten-Tap programmable to allow for selection of three different programs: high/strobe (factory default), high only, or low/high.

The ProTac Rail Mount HP-X Pro uses the latest in LED technology for extreme brightness, delivering 800 lumens, 105,000 candela and a 648-meter beam distance on high setting. On low setting, the light provides 55 lumens, 7,600 candela and a beam distance of 174 meters. The new light runs for up to two hours on high and 26 hours on low when using an SL-B26 battery pack. With two CR123As inserted, the light’s run time is up to 1.5 hours on high and 21 hours on low. The run time for the strobe feature is up to 3.5 hours depending on the type of battery used.

The ProTac Rail Mount HP-X Pro is fabricated from 6000 series machined aircraft aluminum. It measures 5.63 inches in length and weighs 6.4 ounces with two CR123A batteries and 7.0 ounces with an SL-B26 rechargeable battery. When using the standard push-button switch, it is IP67-rated for waterproof operation to one meter for 30 minutes and is IP54-rated for water-resistant operation with the remote pressure switch installed. The ProTac Rail Mount HL-X Pro is available as a light only or as a system, which includes a momentary remote pressure switch, retaining clips, double-sided tape, zip ties and an M-Lok mount.

The ProTac Rail Mount HL-X Pro has an MSRP that ranges from $210 to $266 depending on the configuration and includes Streamlight’s limited lifetime warranty. More information on this light or other products from Streamlight is available at streamlight.com.

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