If you want a clean comparison between two serious rifle lights, a good matchup is the SureFire M640DFT-Pro Turbo Scout Light against the Modlite OKW V2 18650 Rifle Light Package. Both are built for hard use, both are made for weapon mounting, and both are aimed at shooters who care more about performance than gimmicks. The biggest difference is how each company balances beam pattern, runtime, ecosystem, and overall use case.
Quick answer
The SureFire M640DFT-Pro is the better pick for someone who wants a proven, turnkey light with excellent throw, longer listed runtime on its included 18650, and easy compatibility with the broader Scout-style ecosystem. The Modlite OKW V2 18650 is the better pick for someone who wants a very focused, high-candela beam with more raw lumen output and a strong enthusiast following around modular setups.
Output and beam performance
The SureFire M640DFT-Pro is rated at 700 lumens, 100,000 candela, and a listed distance of 632 meters when using the included SF18650 battery. With two 123A batteries, it drops to 600 lumens and 90,000 candela. That tells you exactly what the light is meant to do: push a very tight, high-intensity beam downrange.
The Modlite OKW V2 18650 is listed at about 1,300 lumens and about 95,000 candela, with a 75-minute runtime. That makes it a very throw-oriented light too, but with more total lumen output on paper than the SureFire.
In real-world terms, these two lights live in the same general lane: both are geared toward strong downrange identification and punching through photonic barriers better than older floodier designs. The SureFire has a slight edge in published candela, while the Modlite OKW has a big edge in published lumens. That usually means the SureFire feels a little more laser-focused, while the Modlite still throws hard but can appear a touch “hotter” overall. That last part is an inference from the published specs rather than a manufacturer claim.
Runtime and battery flexibility
One of the strongest points for the SureFire M640DFT-Pro is runtime. SureFire lists 2.75 hours on the included SF18650 and 1 hour on two 123A batteries. It is explicitly a dual-fuel setup.
The Modlite OKW V2 18650 package is also dual fuel on the 18650 body and supports 18650 or two CR123 batteries, but the listed runtime is 75 minutes.
That gives SureFire a clear published runtime advantage in this particular comparison. For a user who wants longer listed runtime without thinking much about battery management, that matters. For a user prioritizing intensity and modularity over runtime, Modlite still stays very competitive.
Mounting and setup philosophy
SureFire sells the M640DFT-Pro as a more complete, mainstream-ready package. It includes the Scout Light Pro mounting setup and comes from one of the most established names in weapon lights. The product is designed around the Scout Light Pro format and ships with a click tailcap.
Modlite’s OKW V2 18650 package is more modular in spirit. Modlite notes that its rifle light packages may require the user to select a separate mount depending on the package, and its system is popular with users who like mixing heads, bodies, caps, and switches to tune a setup exactly how they want.
That means SureFire tends to be the easier recommendation for someone who wants a polished, install-it-and-go option. Modlite tends to appeal more to enthusiasts who enjoy building around a preferred tailcap, switch, and mount ecosystem.
Durability and reputation
Both brands position these lights as hard-use tools. SureFire highlights aluminum construction, Mil-Spec hard anodizing, and IPX7 liquid ingress protection for the M640DFT-Pro.
Modlite states that its drivers are fully potted and tested, and that the OKW/PLHv2 heads are built to withstand heavy recoil, including SCAR 17 use. It also advertises a lifetime guarantee.
From a buyer perspective, both have strong reputations, but they land a little differently in the market. SureFire has more of the longstanding institutional and duty-light reputation. Modlite has more of the enthusiast-performance and modular-upgrade reputation. That characterization is a market inference based on brand positioning and product design, not a direct manufacturer claim.
Price
SureFire lists the M640DFT-Pro at $409 to $439 on its site.
Modlite lists the OKW V2 18650 Rifle Light Package starting at $279, while its newer FUEL 18650 Rifle Light Package is shown at $350.
So if you are price-sensitive, Modlite can come in lower depending on the package. Once you factor in mounts, switches, and accessories, the gap may narrow, but on listed starting price alone, Modlite is typically cheaper.
Which one I would choose
For a general-purpose rifle light recommendation, I would pick the SureFire M640DFT-Pro Turbo Scout Light. Its combination of 100,000 candela, longer listed 18650 runtime, dual-fuel flexibility, and polished Scout-format package makes it the safer all-around recommendation for most buyers.
I would choose the Modlite OKW V2 18650 when the priority is a more enthusiast-driven setup, slightly higher listed lumen output, and a platform that rewards users who like to fine-tune their light configuration.
Bottom line
If you want plug-and-play confidence, longer listed runtime, and one of the most established weapon-light platforms out there, go SureFire M640DFT-Pro.
If you want a high-performance modular setup with strong throw and a lower starting price, go Modlite OKW V2 18650.