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GL4 3300 Lumens USB-C Rechargeable Rail-Mounted Light

$104.99

Built for real-world use
✓ Free shipping on all orders
✓ 30-day hassle-free returns
✓ Warranty on every product
✓ Ships fast from the US

  • 3300 lumens max brightness with 747 ft beam throw
  • Built for real-world use with tough, durable construction
  • IPX8 waterproof, USB-C rechargeable, up to 375 hours of runtime
  • Professional-grade cable pressure switch for remote activation

FAQS
  • How bright is the Klarus GL4?
    The GL4 delivers up to 3300 lumens for maximum visibility in low-light environments.
  • How is the light controlled?
    It uses a remote pressure switch system that allows fast activation and mode control without changing grip.
  • How long does the battery last?
    Runtime can reach up to 375 hours on lower output settings, depending on usage.
  • Is the GL4 built for harsh conditions?
    Yes. It is designed with durable materials to withstand demanding environments.
  • What mounting systems does it support?
    The GL4 is designed for standard rail-mounted applications.

Full Specifications

Model: GL4
Maximum Output: 3300 lumens
Runtime: Up to 375 hours on low mode
Output Levels: Turbo 3300 lumens, High 1200 lumens, Medium 200 lumens, Low 10 lumens, Strobe 3300 lumens
Runtime by Mode: Turbo 4 hours, High 7 hours, Medium 13.5 hours, Low 375 hours
Candela: Up to 34240 cd
Beam Distance: Up to 1213 ft
Beam Distance by Mode: Turbo 1213 ft, High 656 ft, Medium 262 ft, Low 65 ft Control System: Remote pressure switch with cable control
Mounting: Rail mounted design
Construction: Rugged, durable build for extreme conditions
Battery: 1 x 21700
Working Voltage: 2.8 to 4.2V
Charging: 5V 2A
Drop Resistance: 4.92 ft
Water Resistance: IPX8 rated for up to 30 minutes submerged at 6.5 ft
Dimensions: 5.5 in x 1.18 in x 1.06 in
Weight: 5.3 oz without battery
Warranty: 5 years

Best Uses & Real-World Applications

  • Rail-mounted tactical lighting
    High-output illumination for equipment-mounted applications requiring maximum brightness.
  • Professional & duty use
    Designed for extended operations where reliable lighting and remote control are critical.
  • Outdoor & low-light operations
    Strong beam output for navigation, search, and situational awareness in dark environments.
  • Emergency & preparedness
    Long runtime and powerful output for sustained use during critical situations.

Shipping Info

Orders typically ship within 24 hours (excluding holidays)

Description

For the user who wants maximum-output rail-mounted lighting in extreme environments. The Klarus GL4 delivers 3,300 lumens of high-output illumination — the brightness ceiling in the rail-mounted category — with USB-C charging and a long-life battery for sustained use.

✓ Authorized Klarus dealer ✓ Ships from Florida in 24 hours ✓ Free shipping on orders $49+

Klarus GL4 High-Output Rail-Mounted Light

Extreme Brightness for Demanding Environments

The GL4 delivers 3,300 lumens — top-of-class output for rail-mounted lighting. The high-output configuration is built for users who need to overpower ambient light, identify targets at long distances, or maintain illumination through windshield glass.

Tactical Switch Operation

  • Tail-control activation — fast, intuitive operation
  • Multiple output modes — turbo, high, medium, low
  • Strobe — disorientation and signaling
  • Lockout — prevents accidental activation

USB-C Rechargeable

USB-C charging from any standard cable. Long-life integrated battery delivers extended runtime even at high output levels.

Tool-Free Picatinny Mounting

Quick-attach mounting and removal from standard Picatinny rails in seconds, without tools.

Built for Hard Use

Aircraft-grade aluminum body, hard-anodized matte finish, water-resistant rating, and impact-resistant construction. Built for the conditions where 3,300 lumens actually matter.

Who the GL4 Is For

The GL4 is built for users who need maximum output in a rail-mounted platform — duty professionals, range users, hunters working long distances, and prepared citizens who value top-tier capability.

Backed by Klarus's manufacturer warranty and our simple 30-day return policy.

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