Comparison Console
Sofirn SK31 vs ThruNite TT20 The Outsider
EDC Flashlights comparison. Compare price, weight, specifications, materials, and real-world use case.
Command Brief
Recommended read
ThruNite TT20 The Outsider stands out as the lightest option for weight, with about a 19% gap from the closest alternative. Sofirn SK31 stands out as the cheapest option for retail price, with about a 12% gap from the closest alternative. Sofirn SK31 stands out as the highest output option for max lumens, with about a 169% gap from the closest alternative.
Decision Signals
What stands out
Sofirn SK31 stands out as the cheapest option for retail price, with about a 12% gap from the closest alternative.
ThruNite TT20 The Outsider stands out as the most expensive option for retail price, with about a 13% gap from the closest alternative.
ThruNite TT20 The Outsider stands out as the lightest option for weight, with about a 19% gap from the closest alternative.
Sofirn SK31 stands out as the heaviest option for weight, with about a 23% gap from the closest alternative.
ThruNite TT20 The Outsider stands out as the lowest output option for max lumens, with about a 63% gap from the closest alternative.
Sofirn SK31 stands out as the highest output option for max lumens, with about a 169% gap from the closest alternative.
Sofirn SK31 stands out as the shortest runtime option for max runtime, with about a 79% gap from the closest alternative.
ThruNite TT20 The Outsider stands out as the longest runtime option for max runtime, with about a 380% 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$60Most expensive
Weight
223.3 g (7.88 oz)Heaviest
181 g (6.38 oz)Lightest
Length
156.1 mm (6.15 in)Longest
136 mm (5.35 in)Shortest
Output
Max lumens
6800 lmHighest output
2526 lmLowest output
Max candela
Unknown
26483 cd
Beam distance
395 m (1296 ft)Highest
305 m (1001 ft)Lowest
Max runtime
30000 minShortest runtime
144000 minLongest runtime
Power & durability
Battery type
21700 Li-ion rechargeable
21700 lithium-ion customized proprietary battery
Charging type
USB-C 5V 3A, approx. 3 hours charging time
USB-C charging
Rechargeable
Yes
Yes
IP rating
IPX8
IPX8
Impact resistance
Unknown
1.5 m (5 ft)
Material
Aluminum alloy body, stainless steel bezel with tungsten spheres
Military-grade aluminum AL 6061-T6
Use case profile
Best for
Tactical useOutdoor useSearch and rescueLaw enforcementEDCHome defensePatrol duty
HuntingEmergenciesOutdoor activitiesNight patrolSecurity patrolRoadside emergenciesTactical 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
High maximum output (up to 2526 lumens)Long beam throw (305 meters)Very long firefly mode runtime (up to 100 days at 0.5 lumens)Dual switch interface enabling tactical and daily useUSB-C direct recharge with battery level indicatorDurable IPX8 waterproof and 1.5 meter impact resistanceIncluded proprietary 5000mAh 21700 battery and accessories (holster, lanyard, spare o-rings)Well-designed clip and pocket carry optionsSolid build quality with smooth reflector and good beam pattern
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
Proprietary battery only compatible with this lightSomewhat heavy and large for pocket carryClip can rotate and may scar the bodySmall fixed step brightness ramp instead of completely smooth rampCharging port cover may sometimes open unintentionally
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