Surefire Scout Light Pro Dual Fuel M640DF — 1,500/1,200 lm

The Surefire Scout Light Pro Dual Fuel (M640DF) is a compact, rail-mounted illumination solution designed for modern tactical rifles. It accepts either one SF18650B rechargeable lithium-ion cell or two CR123A (123A) lithium batteries, producing selectable high-output levels. The light includes Surefire's Low-Profile Mount (LPM) and is compatible with MIL-STD-1913 (Picatinny) and M-LOK rails.

Key Specifications

• The high output reaches 1,500 lumens when powered by an SF18650B rechargeable battery and 1,200 lumens with two 123A batteries.
• The runtime is up to 1.5 hours on the SF18650B and approximately 1.25 hours on two 123A batteries.
• The reported peak beam intensity is 16,000 candela with SF18650B and 12,800 candela with 123A cells.
• The maximum beam distance is approximately 250 meters with SF18650B and 220 meters with 123A cells.
• Power options include SF18650B rechargeable or two CR123A (123A) lithium batteries.
• The body is constructed from Mil-Spec hard-anodized aluminum with O-ring seals for environmental resistance.
• The Low-Profile Mount (LPM) supports MIL-STD-1913 (Picatinny) and M-LOK rail interfaces and is included with the light.
• The overall length is 5.56 inches and the head diameter is 1.125 inches.
• The unit weighs approximately 5.5 oz with batteries installed.
• The light carries an IPX7 rating for waterproof protection under specified conditions.

The Scout Light Pro Dual Fuel pairs compact size with flexible power options and proven optics to deliver usable reach and surround illumination for mounted applications. Its low-profile mounting hardware and ambidextrous tailcap switching make it practical for a range of setups where reliable, high-output light is required.