The SureFire M640DF Scout Light Pro Dual Fuel delivers up to 1500 lumens with rechargeable 18650 power or 1200 lumens using two CR123A batteries. It features a 250-meter beam, TIR lens, tailcap switch, USB charging, and an adjustable low-profile mount for compatible Picatinny and M-LOK rails.
The SureFire M640DF Scout Light Pro Dual Fuel is built around power-source flexibility and high-output weapon-mounted illumination. Measuring 5.5 inches overall, it produces up to 1500 lumens with the included rechargeable 18650 battery while retaining the ability to operate on two CR123A batteries when needed.
With the included 18650 battery, the M640DF reaches a maximum output of 1500 lumens and provides approximately one and a half hours of runtime. This configuration delivers the light's highest specified output while supporting rechargeable operation.
When powered by two CR123A batteries, output is rated at 1200 lumens with approximately one hour and fifteen minutes of runtime. The CR123A batteries are not included, but their compatibility provides a useful alternate power option when rechargeable power is unavailable.
An ultra-high-output LED and TIR lens produce a beam reaching up to 250 meters. The included low-profile mount can be positioned to optimize the light's placement relative to the rail, helping users configure the housing around other compatible equipment.
The Scout Light Pro can be mounted to Picatinny or M-LOK rails. A tailcap switch provides direct activation, while an included USB charging cord supports recharging of the supplied 18650 battery.
The black aluminum housing is both water resistant and impact resistant, adding durability to the dual-fuel design.
The SureFire M640DF stands out for combining high output with flexible battery choices. Its 1500-lumen rechargeable mode, CR123A backup compatibility, 250-meter beam, adjustable low-profile mounting system, and support for both Picatinny and M-LOK rails make it a versatile Scout Light configuration.
