Comparison Console
Acebeam P20 vs Streamlight Knucklehead Spot
EDC Flashlights comparison. Compare price, weight, specifications, materials, and real-world use case.
Command Brief
Recommended read
Acebeam P20 stands out as the lightest option for weight, with about a 23% gap from the closest alternative. Streamlight Knucklehead Spot stands out as the cheapest option for retail price, with about a 17% gap from the closest alternative. Acebeam P20 stands out as the highest output option for max lumens, with about a 3011% gap from the closest alternative.
Decision Signals
What stands out
Streamlight Knucklehead Spot stands out as the cheapest option for retail price, with about a 17% gap from the closest alternative.
Acebeam P20 stands out as the most expensive option for retail price, with about a 20% gap from the closest alternative.
Acebeam P20 stands out as the lightest option for weight, with about a 23% gap from the closest alternative.
Streamlight Knucklehead Spot stands out as the heaviest option for weight, with about a 30% gap from the closest alternative.
Streamlight Knucklehead Spot stands out as the lowest output option for max lumens, with about a 97% gap from the closest alternative.
Acebeam P20 stands out as the highest output option for max lumens, with about a 3011% gap from the closest alternative.
Streamlight Knucklehead Spot stands out as the shortest runtime option for max runtime, with about a 53% gap from the closest alternative.
Acebeam P20 stands out as the longest runtime option for max runtime, with about a 111% 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$200Most expensive
US$166.73Cheapest
Weight
504 g (17.78 oz)Lightest
655 g (23.10 oz)Heaviest
Length
267.5 mm (10.53 in)Longest
234 mm (9.21 in)Shortest
Output
Max lumens
5600 lmHighest output
180 lmLowest output
Max candela
528529 cdHighest candela
11000 cdLowest candela
Beam distance
1454 m (4770 ft)Highest
210 m (689 ft)Lowest
Max runtime
4440 minLongest runtime
2100 minShortest runtime
Power & durability
Battery type
2x 21700 lithium-ion (battery pack with built-in USB-C)
NiCd rechargeable battery pack or 4 AA alkaline batteries
Charging type
USB-C (built into battery pack)
Unknown
Rechargeable
Yes
Yes
IP rating
IP68 (2m/30min)
IPX4
Impact resistance
1.5 m (5 ft)Lowest
2 m (7 ft)Highest
Material
Aluminium alloy (HAIII, AL6061-T6)
High-impact, super-tough nylon polymer
Use case profile
Best for
Long distance throwTactical useSelf-defenseVehicle emergenciesExtreme outdoor environments
FirefightingSearch and RescueSituations requiring articulating head beamDurability and long beam distance
Common praise
Exceptional build quality with precise CNC machining and durable anodized aluminum bodyVery high output and extremely long throw capabilityDual-switch interface with dedicated momentary turboFlexible battery options with removable battery pack and compatibility with two 21700 batteriesGood mode spacing and convenient shortcuts including mode memoryEffective thermal management and solid runtime performanceIncludes useful accessories such as carry bag, spare o-rings, USB-C charging cable, and optional green filter
Articulating 360-degree head for flexibilityLong beam distance of 210 metersMultiple brightness levels including long runtime moonlight modeDurable, shockproof construction with IPX4 water resistanceMagnet with strong pull for hands-free use
Common complaints
Tail switch functionality only works with included proprietary battery packNo mechanical lockout; lockout is electronic and slow to activateSix modes might be excessive with some levels closely spacedWeight and size make it less practical for casual everyday carry or indoor useLockout mode has no visual indicatorThreads are unanodized making mechanical lockout impossible and possibly leading to gritty threads over time
Relatively heavy at 655 gramsBattery pack not included, uses either NiCd rechargeable battery pack or 4 AA alkaline batteriesCharging cords and chargers sold separately