Olight ArkTac Ultra vs Wurkkos FC12C size comparison
The Wurkkos FC12C is 0.9 mm (0.04 in) longer than the Olight ArkTac Ultra, and 5 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 0.9 mm (0.04 in) longer than the Olight ArkTac Ultra, and 5 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 ArkTac Ultra Check price ↗ | Wurkkos FC12C Check price ↗ | |
| Length | 135.6 mm (5.34 in) | 136.5 mm (5.37 in)+0.9 mm |
| Head / width | 29 mm (1.14 in) | 24 mm (0.94 in)−5 mm |
| Thickness | 17 mm (0.67 in) | — |
| Weight | 140 g with battery | 85 g listed (battery unspecified) |
| Battery | Built-in | 21700 |
| Max output | — | — |
| Throw | — | — |
| Type | EDC | EDC |
| Price | $159.99 at olight.com, as of Nov 4, 2026 | $35.99 at flashlightgo.com, as of Nov 4, 2026 |
| Source | olight.com unverified Dims from ArkTac series comparison table (row assumed to be Ultra); re-check on ArkTac Ultra page | flashlightgo.com sourced Only head diameter listed |
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ArkTac Ultra vs FC12C: how they differ
Size and weight
The Olight ArkTac Ultra is the shorter light: 135.6 mm (5.34 in) against 136.5 mm (5.37 in), a difference of 0.9 mm (1%). At its widest point the Wurkkos FC12C is 5 mm slimmer (24 vs 29 mm). Weights are published on different bases (Olight ArkTac Ultra: 140 g with battery; Wurkkos FC12C: 85 g listed (battery unspecified)), so they are not directly comparable.
Battery
The Olight ArkTac Ultra runs on a built-in rechargeable battery; the Wurkkos FC12C runs on a removable 21700 battery. Only the Wurkkos FC12C lets you swap in a charged spare.
Price
When we checked on Nov 4, 2026, the Olight ArkTac Ultra was $159.99 at olight.com and the Wurkkos FC12C $35.99 at flashlightgo.com, so the Wurkkos FC12C cost $124.00 less. Prices change often, so check the current price before you buy.
Type
Both are EDC lights in our catalog.
Which should you buy?
Choose the Olight ArkTac Ultra if you want a built-in battery with no separate cell to buy. Choose the Wurkkos FC12C if you want a slimmer profile (5 mm narrower) and a removable cell you can swap. We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Olight ArkTac Ultra Check price ↗ Wurkkos FC12C
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ArkTac Ultra vs FC12C FAQ
Which is smaller, the Olight ArkTac Ultra or the Wurkkos FC12C?
The Olight ArkTac Ultra is the shorter light: 135.6 mm (5.34 in) against 136.5 mm (5.37 in), a difference of 0.9 mm (1%). At its widest point the Wurkkos FC12C is 5 mm slimmer (24 vs 29 mm). Weights are published on different bases (Olight ArkTac Ultra: 140 g with battery; Wurkkos FC12C: 85 g listed (battery unspecified)), so they are not directly comparable.
Which is cheaper, the Olight ArkTac Ultra or the Wurkkos FC12C?
When we checked on Nov 4, 2026, the Olight ArkTac Ultra was $159.99 at olight.com and the Wurkkos FC12C $35.99 at flashlightgo.com, so the Wurkkos FC12C cost $124.00 less. Prices change often, so check the current price before you buy.
Do the Olight ArkTac Ultra and Wurkkos FC12C use the same battery?
The Olight ArkTac Ultra runs on a built-in rechargeable battery; the Wurkkos FC12C runs on a removable 21700 battery. Only the Wurkkos FC12C lets you swap in a charged spare.
Compare Olight ArkTac Ultra with similar lights
Compare Wurkkos FC12C with similar lights
More
Sources
- Olight ArkTac Ultra: specs from Olight product page (manufacturer). Some values could not be confirmed on a second source and are marked unverified. Price $159.99 from olight.com, checked Nov 4, 2026; prices change often.
- 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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