Comparison Console
Sofirn SK31 vs Sofirn SP36 BLF
EDC Flashlights comparison. Compare price, weight, specifications, materials, and real-world use case.
Command Brief
Recommended read
Sofirn SK31 stands out as the lightest option for weight, with about a 48% gap from the closest alternative. Sofirn SK31 stands out as the cheapest option for retail price, with about a 2% gap from the closest alternative. Sofirn SK31 stands out as the highest output option for max lumens, with about a 20% gap from the closest alternative.
Decision Signals
What stands out
Sofirn SK31 stands out as the cheapest option for retail price, with about a 2% gap from the closest alternative.
Sofirn SP36 BLF stands out as the most expensive option for retail price, with about a 2% gap from the closest alternative.
Sofirn SK31 stands out as the lightest option for weight, with about a 48% gap from the closest alternative.
Sofirn SP36 BLF stands out as the heaviest option for weight, with about a 94% gap from the closest alternative.
Sofirn SP36 BLF stands out as the lowest output option for max lumens, with about a 17% gap from the closest alternative.
Sofirn SK31 stands out as the highest output option for max lumens, with about a 20% gap from the closest alternative.
Sofirn SK31 stands out as the shortest runtime option for max runtime, with about a 54% gap from the closest alternative.
Sofirn SP36 BLF stands out as the longest runtime option for max runtime, with about a 116% gap from the closest alternative.
Specification Profile
Relative dimensions at a glance
Each axis is normalized against the largest raw value among the products in this comparison. Farther outward means a larger value, not necessarily a better result. Axes with an unverified value are omitted.
Price & carry
Retail price
US$52.99Cheapest
US$53.99Most expensive
Weight
223.3 g (7.88 oz)Lightest
433.3 g (15.28 oz)Heaviest
Length
156.1 mm (6.15 in)Longest
126.8 mm (4.99 in)Shortest
Output
Max lumens
6800 lmHighest output
5650 lmLowest output
Max candela
Unknown
31577 cd
Beam distance
395 m (1296 ft)Highest
355.4 m (1166 ft)Lowest
Max runtime
30000 minShortest runtime
64800 minLongest runtime
Power & durability
Battery type
21700 Li-ion rechargeable
3x 18650 button top
Charging type
USB-C 5V 3A, approx. 3 hours charging time
USB Type-C
Rechargeable
Yes
Yes
IP rating
IPX8
IPX-8 (submersible to 2 meters)
Impact resistance
Unknown
Unknown
Material
Aluminum alloy body, stainless steel bezel with tungsten spheres
Aluminum
Use case profile
Best for
Tactical useOutdoor useSearch and rescueLaw enforcementEDCHome defensePatrol duty
EDCEmergency lightingLong runtimeHigh outputOutdoor useCampingSearchingMilitary use
Common praise
High max output of 6800 lumensLong beam distance (395 meters)Robust aluminum body with stainless steel bezel and tungsten spheres for glass breakingEfficient LHP73B LED emitter with clean tintTriple-switch interface allowing intuitive controlExcellent water resistance with screwable aluminum USB-C coverLong runtime up to 500 hours on low modeIncluded rechargeable 21700 batteryBattery indicator for charge level
Very high output (up to 5650 lumens)Excellent runtime especially on low modesAdvanced and customizable Anduril 2 UIUSB-C charging with powerbank capabilitySolid build quality with good grip and durable materialsNeutral white LED with high CRI (90)Multiple modes including unlock and lockoutWell suited for large hands and outdoor use
Common complaints
Lockout switch placement can be awkwardLockout switch sometimes malfunctions causing failure to turn on (resolvable by toggling lockout)Included battery has lower continuous discharge rating (CDR) than recommended for max turbo output
Quite large and heavy for pocket carryRound body prone to rolling on uneven surfacesHeats up quickly on high/turbo modesNot ideal for users with small handsButton top batteries required (flat tops unstable)
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