Surefire M640DF Scout Light Pro Dual Fuel 1500 Lumens

The Surefire M640DF Scout Light Pro Dual Fuel is a compact, rail-mounted illumination solution designed for mounted use. Its dual-fuel design accepts an SF18650B rechargeable battery or two CR123A cells, producing up to 1,500 lumens with the rechargeable cell and 1,200 lumens with 123A batteries. The Low-Profile Mount (LPM) enables adjustable positioning on MIL-STD-1913 (Picatinny) and M-LOK rails. Built from aerospace-grade aluminum, finished with Mil‑Spec hard‑anodizing and sealed with O-rings, the unit is engineered for reliability and environmental resistance.

Key Specifications

• High output of 1,500 lumens with SF18650B or 1,200 lumens with two 123A batteries.
• Power options include SF18650B rechargeable or two CR123A / 123A batteries.
• High runtime of 1.5 hours (SF18650B) or 1.25 hours (123A).
• Peak beam intensity of 16,000 candela (SF18650B) or 12,800 candela (123A).
• Effective beam distance up to 250 meters (SF18650B) or 220 meters (123A).
• Constructed from aluminum with a Mil‑Spec hard‑anodized finish.
• Overall length of 5.56 inches.
• Weight with batteries is 5.5 oz.
• Includes MIL‑STD‑1913 (Picatinny) and M‑LOK mounting hardware and a Low‑Profile Mount (LPM).
• Activation via Z68 momentary/constant‑on pushbutton tailcap with protective shroud.

The M640DF Scout Light Pro pairs high output and a focused TIR beam with a compact footprint and adjustable mounting options, making it well suited for users who need dependable illumination across close-to-longer-range tasks. Its durable construction, weather sealing to IPX7, and included mounting hardware ensure straightforward integration with modern platforms while preserving a low profile. For those seeking a reliable, high-output mounted light that balances performance and durability, the M640DF is a practical choice.