Comparison Console
Fenix TK21R vs Olight Seeker 4 Pro
EDC Flashlights comparison. Compare price, weight, specifications, materials, and real-world use case.
Command Brief
Recommended read
Fenix TK21R stands out as the lightest option for weight, with about a 1% gap from the closest alternative. Fenix TK21R stands out as the cheapest option for retail price, with about a 7% gap from the closest alternative. Olight Seeker 4 Pro stands out as the highest output option for max lumens, with about a 28% gap from the closest alternative.
Decision Signals
What stands out
Fenix TK21R stands out as the cheapest option for retail price, with about a 7% gap from the closest alternative.
Olight Seeker 4 Pro stands out as the most expensive option for retail price, with about a 7% gap from the closest alternative.
Fenix TK21R stands out as the lightest option for weight, with about a 1% gap from the closest alternative.
Olight Seeker 4 Pro stands out as the heaviest option for weight, with about a 1% gap from the closest alternative.
Fenix TK21R stands out as the lowest output option for max lumens, with about a 22% gap from the closest alternative.
Olight Seeker 4 Pro stands out as the highest output option for max lumens, with about a 28% gap from the closest alternative.
Olight Seeker 4 Pro stands out as the shortest runtime option for max runtime, with about a 99% gap from the closest alternative.
Fenix TK21R stands out as the longest runtime option for max runtime, with about a 7150% 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$130.43Cheapest
US$139.99Most expensive
Weight
221.4 g (7.81 oz)Lightest
223 g (7.87 oz)Heaviest
Length
153.3 mm (6.04 in)Longest
133 mm (5.24 in)Shortest
Output
Max lumens
3600 lmLowest output
4600 lmHighest output
Max candela
Unknown
16900 cd
Beam distance
480 m (1575 ft)Highest
260 m (853 ft)Lowest
Max runtime
4350 minLongest runtime
60 minShortest runtime
Power & durability
Battery type
21700 lithium-ion
21700 rechargeable lithium-ion (proprietary)
Charging type
USB Type-C
USB-C, magnetic (optional MCC3 charger)
Rechargeable
Yes
Yes
IP rating
IP68
IPX8
Impact resistance
1.5 m (5 ft)
1.5 m (5 ft)
Material
Aluminum alloy A6061-T6
Anodized aluminum alloy with rubberized grip
Use case profile
Best for
Tactical UsePatrollingSearch And RescueTraffic InspectionSelf Defense
EDC UseCampingHikingMaintenanceNight DutyDog WalkingEmergencyFlood IlluminationTerrain Lighting
Common praise
Very Bright With Strong BeamSolid Build QualityIp68 Waterproof RatingLong RuntimeFast USB C ChargingComfortable Size For Tactical UseImproved Tactile Switch Feel
Bright Output With A Wide And Smooth Flood BeamConvenient Dual Charging Options Including USB CIntuitive Rotary Switch With Stepless DimmingDurable Ipx8 Waterproof RatingBuilt In Charging Holster With Multiple Carrying Options
Common complaints
Larger Size Compared To Some EDC FlashlightsNo Detailed Mode Descriptions Available
Auto Lock Feature Can Be Frustrating Without HolsterWeight May Be Heavy For Some Users For Pocket Carry
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