StreamlightWeapon Light
Streamlight ProTac Rail Mount 1L-X USB Weapon Light 850 Lumens
- 850 lumens output and 30,000 candela peak beam intensity; 346 metre beam
- SL-B9 USB rechargeable pack and cord included
- 500 lumens and 18,000 candela on a CR123A cell as backup fuel
- 100 lumen low with 3,400 candela and a 117 metre beam
In stock — 7–10 business day delivery
Tracked delivery, estimated 7–10 working days
Want to know when it's back? Email us and we'll let you know
Multi-buy savings
Mix any optics and lights — applied automatically
- 5%2 items
- 10%3 items
- 15%4 or more
Applied automatically at checkout — no code needed. Accessories such as tailcaps, switches and mounts aren't included.
Complete your setup
- Shipped from the UK with tracked delivery
- 30-day returns on unused items
- Warranty support — contact us first
Delivery
Every order is shipped from the UK with tracked delivery. Estimated delivery time is 7–10 working days, and you will receive tracking details by email as soon as your order is on its way.
Returns
Unused items in their original packaging can be returned within 30 days. Email info@opticstrader.co.uk first and we will confirm the return details.
Warranty
Every product is new and boxed. If anything goes wrong, contact us first and we'll help with a manufacturer warranty claim where one applies.
The Streamlight ProTac Rail Mount 1L-X USB (SKU 89027) is a compact rail-mounted rifle light supplied with the SL-B9 USB rechargeable battery pack and cord, so it runs at its full 850 lumens output and 30,000 candela peak beam intensity for a 346 metre beam straight out of the box. A CR123A lithium cell works as a backup fuel source at 500 lumens.
It uses a simple push-button tail switch, has TEN-TAP programmable mode order, and mounts to MIL-STD-1913 Picatinny rails with an M-LOK mount included. The body is 6000-series black anodised aircraft aluminium, rated IP67 with the tail switch fitted, and measures 4.64 inches.
How it compares
The same light supplied with a CR123A instead of the rechargeable pack is the Streamlight ProTac Rail Mount 1L-X rifle weapon light. If you need remote pressure-switch capability, the Streamlight ProTac Rail Mount 1L-X USB Pro rifle weapon light adds the Jack-Cap tail cap. Browse all rechargeable rifle and pistol lights, or compare figures in our lumens vs candela chart.
Ideal for
- Night fox and vermin control where a compact rifle light suits a short handguard
- Civilian Service Rifle, straight-pull and 3-Gun carbines used often enough to justify recharging
- Airsoft and training builds wanting a clean tail-switch setup
- Farm and yard work on a carbine or shotgun
Key features
- 850 lumens output and 30,000 candela peak beam intensity; 346 metre beam
- SL-B9 USB rechargeable pack and cord included
- 500 lumens and 18,000 candela on a CR123A cell as backup fuel
- 100 lumen low with 3,400 candela and a 117 metre beam
- Push-button tail switch; TEN-TAP programmable mode order
- Picatinny fit with M-LOK mount included; IP67 with tail switch
| Output (SL-B9) | 850 lumens / 30,000 candela / 346 m (0.5 h); 100 lumens / 3,400 candela / 117 m low (4.5 h) |
| Output (CR123A) | 500 lumens / 18,000 candela / 268 m (1.75 h); 100 lumens low (6.5 h) |
| Strobe Runtime | 1.25 h on SL-B9 / 2.5 h on CR123A |
| Battery | One SL-B9 USB rechargeable pack (included) or one CR123A lithium cell |
| Activation | Push-button tail switch |
| Mount | MIL-STD-1913 Picatinny; M-LOK mount included |
| Length / Weight | 4.64 in (11.79 cm) / 5.22 oz with SL-B9, 5.12 oz with CR123A |
| Construction | 6000-series machined aircraft aluminium, black anodised |
| Durability | IP67 (1 metre, 30 minutes) with tail switch fitted |
| What's Included | Light, tailcap switch, mounting hardware, M-LOK mount, SL-B9 battery pack, USB cord |
| SKU / MPN / UPC | 89027 / 89027 / 080926890275 |
Is the Streamlight ProTac 1L-X USB rechargeable, and how is it charged?
Yes — the Streamlight ProTac Rail Mount 1L-X USB is supplied with an SL-B9 USB rechargeable battery pack, which charges using the cord included in the box.
What rail does the Streamlight ProTac 1L-X USB fit?
The Streamlight ProTac Rail Mount 1L-X USB fits MIL-STD-1913 Picatinny rails directly, and an M-LOK mount is included for M-LOK handguards.
How bright is the Streamlight ProTac 1L-X USB and how far does it throw?
The Streamlight ProTac Rail Mount 1L-X USB produces 850 lumens output and 30,000 candela peak beam intensity on the SL-B9 pack, giving a beam distance of 346 metres.
What is the difference between the Streamlight ProTac 1L-X USB and the standard 1L-X?
They are the same light: part number 89027 includes the SL-B9 rechargeable pack and USB cord for full 850 lumen output, while part number 89026 ships with a CR123A cell and runs at 500 lumens.
Every order is shipped from the UK with tracked delivery, with an estimated delivery time of 7–10 working days. Unused items in their original packaging can be returned within 30 days for a full refund.