The Streamlight ProTac Rail Mount HL-X Weapon Light is a high-value long-gun weapon light with serious reach — 1000 lumens and 50,000 candela for a 447m beam, plus a 60-lumen low. It ships complete with both a remote pressure switch and a push-button tail cap, with TEN-TAP programming (high/strobe, high only, or low/high).
It's dual fuel — one SL-B26 rechargeable or two CR123As — and mounts to Picatinny rails with an M-LOK mount included. This 88066 kit ships with two CR123A lithium cells (no SL-B26 or charging cord). Anodised aluminium, tempered-glass lens, IP67 with the push-button fitted.
How It Compares
Want 2000 lumens? The ProTac 2.0 Rail. Compact single-cell? The TLR RM 1 HL-X. Budget option? The ProTac Rail Mount 1. Browse all weapon lights and our lumens vs candela chart.
Ideal For
- Rifles and carbines needing long throw
- Duty and defensive long guns
- Picatinny or M-LOK handguards
Key Features
- 1000 lm / 50,000 cd / 447 m; 60 lm / 3,100 cd / 111 m low
- Remote pressure switch + tail cap both included
- TEN-TAP programmable
- Dual fuel: SL-B26 or 2× CR123A (two CR123A supplied)
- Picatinny + M-LOK mounts; IP67
Technical Specifications
| Output |
1000 lm / 50,000 cd / 447 m (high); 60 lm / 3,100 cd / 111 m (low) |
| Runtime (high) |
1.25 h (2× CR123A) / 1.75 h (SL-B26) |
| Runtime (low) |
21 h (2× CR123A) / 24 h (SL-B26) |
| Battery |
1× SL-B26 or 2× CR123A |
| Mount |
MIL-STD-1913 Picatinny; M-LOK mount included |
| Length / Weight |
5.43 in (13.79 cm) / 6.4–6.9 oz |
| Durability |
IP67 with push-button (1 m, 30 min); IP54 with remote |
| SKU / MPN / UPC |
88066 / 88066 / 080926880665 |
| Warranty |
Streamlight Limited Lifetime |
What's Included
- ProTac Rail Mount HL-X weapon light
- Remote pressure switch, tail switch, remote retaining clips, M-LOK mount, mounting hardware, 2× CR123A lithium batteries
UK Delivery & Support
UK-stocked and dispatched tracked from our UK warehouse — no import duties or customs delays — backed by UK-based support and Streamlight's limited lifetime warranty.
Frequently Asked Questions
How far does it throw?
50,000 candela — roughly a 447m beam, unusually long reach for its price class.
Does it include a remote switch?
Yes — both a remote pressure switch and a push-button tail cap are in the box.
Does it come with the rechargeable battery?
No — 88066 ships with two CR123A cells. The SL-B26 USB rechargeable version is part number 88071.
What rails does it fit?
Picatinny directly, or M-LOK with the included mount.
