Comparison Console
Nitecore NU31 vs Sofirn SP40
EDC Flashlights comparison. Compare price, weight, specifications, materials, and real-world use case.
Command Brief
Recommended read
Sofirn SP40 stands out as the lightest option for weight, with about a 3% gap from the closest alternative. Sofirn SP40 stands out as the cheapest option for retail price, with about a 10% gap from the closest alternative. Sofirn SP40 stands out as the highest output option for max lumens, with about a 118% gap from the closest alternative.
Decision Signals
What stands out
Sofirn SP40 stands out as the cheapest option for retail price, with about a 10% gap from the closest alternative.
Nitecore NU31 stands out as the most expensive option for retail price, with about a 11% gap from the closest alternative.
Sofirn SP40 stands out as the lightest option for weight, with about a 3% gap from the closest alternative.
Nitecore NU31 stands out as the heaviest option for weight, with about a 3% gap from the closest alternative.
Nitecore NU31 stands out as the lowest output option for max lumens, with about a 54% gap from the closest alternative.
Sofirn SP40 stands out as the highest output option for max lumens, with about a 118% gap from the closest alternative.
Nitecore NU31 stands out as the shortest runtime option for max runtime, with about a 33% gap from the closest alternative.
Sofirn SP40 stands out as the longest runtime option for max runtime, with about a 50% 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$39.95Most expensive
US$36Cheapest
Weight
95.5 g (3.37 oz)Heaviest
93 g (3.28 oz)Lightest
Length
62.3 mm (2.45 in)Shortest
108 mm (4.25 in)Longest
Output
Max lumens
550 lmLowest output
1200 lmHighest output
Max candela
5800 cdHighest candela
4520 cdLowest candela
Beam distance
145 m (476 ft)Highest
136 m (446 ft)Lowest
Max runtime
8820 minShortest runtime
13200 minLongest runtime
Power & durability
Battery type
Built-in 1800mAh Li-ion battery
1x18650 Li-Ion
Charging type
USB-C charging port (5V
1A)
Micro-USB
Rechargeable
Yes
Yes
IP rating
IP66
IPX7
Impact resistance
1 m (3 ft)
Unknown
Material
Aluminum alloy front housing with durable PC material body
Aluminum
Use case profile
Best for
Outdoor activitiesCampingHikingNight trekkingSkywatching
CampingHikingIndustrial useClose-range workBudget headlamp use
Common praise
Lightweight and compact at 95.5gVersatile lighting modes including white, red, and high CRI auxiliary white lightLong battery runtime up to 147 hoursGood waterproof rating (IP66) and 1 meter impact resistanceUSB-C fast charging with short recharge timeSimple dual-button interface for easy operationReflective headband for safety
High lumen output for priceGood beam quality with Cree XP-L LED and OP reflectorLightweight and comfortable headbandDurable aluminum construction with good waterproofingMagnetic tailcap for hands-free useLow voltage protection to safeguard battery
Common complaints
Charging time varies between 1.5 to 3 hours depending on sourceSlight green tint on white LED reportedCannot replace internal rechargeable battery
Lack of a moonlight modeHeadband loops are somewhat tightClip could be deeper to improve balanceNo USB-C charging (uses micro-USB)
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