Olight Seeker 4 vs Wurkkos FC12C size comparison
The Wurkkos FC12C is 2.5 mm (0.10 in) longer than the Olight Seeker 4, and 11 mm narrower at its widest point. Weights are published on different bases (listed (battery unspecified) vs with battery), so compare them with care.
The Wurkkos FC12C is 2.5 mm (0.10 in) longer than the Olight Seeker 4, and 11 mm narrower at its widest point. Weights are published on different bases (listed (battery unspecified) vs with battery), so compare them with care.
Dimensions
| Olight Seeker 4 Check price ↗ | Wurkkos FC12C Check price ↗ | |
| Length | 134 mm (5.28 in) | 136.5 mm (5.37 in)+2.5 mm |
| Head / width | 35 mm (1.38 in) | 24 mm (0.94 in)−11 mm |
| Body | 28 mm (1.10 in) | — |
| Weight | 205 g with battery | 85 g listed (battery unspecified) |
| Battery | 21700 | 21700 |
| Max output | 3,100 lm | — |
| Throw | — | — |
| Type | EDC not on olight.com (US) | EDC |
| Price | not verified yet | $35.99 at flashlightgo.com, as of Nov 4, 2026 |
| Source | batteryjunction.com sourced Retailer lists 400 m throw, which conflicts with Olight figures for the series; throw omitted | flashlightgo.com sourced Only head diameter listed |
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Seeker 4 vs FC12C: how they differ
Size and weight
The Olight Seeker 4 is the shorter light: 134 mm (5.28 in) against 136.5 mm (5.37 in), a difference of 2.5 mm (2%). At its widest point the Wurkkos FC12C is 11 mm slimmer (24 vs 35 mm). Weights are published on different bases (Olight Seeker 4: 205 g with battery; Wurkkos FC12C: 85 g listed (battery unspecified)), so they are not directly comparable.
Brightness and throw
The Olight Seeker 4 is rated at 3,100 lm; we have no published maximum for the Wurkkos FC12C.
Battery
Both run on a removable 21700 battery, so spare cells work in either light.
Type
Both are EDC lights in our catalog with a tube body.
Which should you buy?
Choose the Wurkkos FC12C if you want a slimmer profile (11 mm narrower). On the specs we track, the Wurkkos FC12C is ahead or level everywhere; the Olight Seeker 4 makes sense mainly if its price, interface or a feature we don't track suits you better. We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Olight Seeker 4 Check price ↗ Wurkkos FC12C
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Seeker 4 vs FC12C FAQ
Which is smaller, the Olight Seeker 4 or the Wurkkos FC12C?
The Olight Seeker 4 is the shorter light: 134 mm (5.28 in) against 136.5 mm (5.37 in), a difference of 2.5 mm (2%). At its widest point the Wurkkos FC12C is 11 mm slimmer (24 vs 35 mm). Weights are published on different bases (Olight Seeker 4: 205 g with battery; Wurkkos FC12C: 85 g listed (battery unspecified)), so they are not directly comparable.
Do the Olight Seeker 4 and Wurkkos FC12C use the same battery?
Both run on a removable 21700 battery, so spare cells work in either light.
Compare Olight Seeker 4 with similar lights
Compare Wurkkos FC12C with similar lights
More
Sources
- Olight Seeker 4: specs from manufacturer published specs as listed by batteryjunction.com. No verified price yet.
- Wurkkos FC12C: specs from manufacturer published specs as listed by flashlightgo.com. Price $35.99 from flashlightgo.com, checked Nov 4, 2026; prices change often.
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