Emisar D4K vs Wurkkos FC12C size comparison
The Wurkkos FC12C is 33.5 mm (1.32 in) longer than the Emisar D4K, and 4 mm narrower at its widest point. Weights are published on different bases (listed (battery unspecified) vs without battery), so compare them with care.
The Wurkkos FC12C is 33.5 mm (1.32 in) longer than the Emisar D4K, and 4 mm narrower at its widest point. Weights are published on different bases (listed (battery unspecified) vs without battery), so compare them with care.
Dimensions
| Emisar D4K Check price ↗ | Wurkkos FC12C Check price ↗ | |
| Length | 103 mm (4.06 in) | 136.5 mm (5.37 in)+33.5 mm |
| Head / width | 28 mm (1.10 in) | 24 mm (0.94 in)−4 mm |
| Body | 26.5 mm (1.04 in) | — |
| Weight | 58 g without battery | 85 g listed (battery unspecified) |
| Battery | 21700 | 21700 |
| Max output | — | — |
| Throw | — | — |
| Type | EDC | EDC |
| Price | $39.69 at intl-outdoor.com, as of Nov 4, 2026 | $35.99 at flashlightgo.com, as of Nov 4, 2026 |
| Source | intl-outdoor.com sourced Output depends on LED option | flashlightgo.com sourced Only head diameter listed |
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
D4K vs FC12C: how they differ
Size and weight
The Emisar D4K is the shorter light: 103 mm (4.06 in) against 136.5 mm (5.37 in), a difference of 33.5 mm (25%). At its widest point the Wurkkos FC12C is 4 mm slimmer (24 vs 28 mm). Weights are published on different bases (Emisar D4K: 58 g without battery; Wurkkos FC12C: 85 g listed (battery unspecified)), so they are not directly comparable.
Brightness and throw
Output for the Emisar D4K depends on the LED option chosen.
Battery
Both run on a removable 21700 battery, so spare cells work in either light.
Price
When we checked on Nov 4, 2026, the Emisar D4K was $39.69 at intl-outdoor.com and the Wurkkos FC12C $35.99 at flashlightgo.com, so the Wurkkos FC12C cost $3.70 less. Prices change often, so check the current price before you buy.
Type
Both are EDC lights in our catalog with a tube body.
Which should you buy?
Choose the Emisar D4K if you want a shorter light (33.5 mm shorter). Choose the Wurkkos FC12C if you want a slimmer profile (4 mm narrower). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Emisar D4K Check price ↗ Wurkkos FC12C
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
D4K vs FC12C FAQ
Which is smaller, the Emisar D4K or the Wurkkos FC12C?
The Emisar D4K is the shorter light: 103 mm (4.06 in) against 136.5 mm (5.37 in), a difference of 33.5 mm (25%). At its widest point the Wurkkos FC12C is 4 mm slimmer (24 vs 28 mm). Weights are published on different bases (Emisar D4K: 58 g without battery; Wurkkos FC12C: 85 g listed (battery unspecified)), so they are not directly comparable.
Which is cheaper, the Emisar D4K or the Wurkkos FC12C?
When we checked on Nov 4, 2026, the Emisar D4K was $39.69 at intl-outdoor.com and the Wurkkos FC12C $35.99 at flashlightgo.com, so the Wurkkos FC12C cost $3.70 less. Prices change often, so check the current price before you buy.
Do the Emisar D4K and Wurkkos FC12C use the same battery?
Both run on a removable 21700 battery, so spare cells work in either light.
Compare Emisar D4K with similar lights
Compare Wurkkos FC12C with similar lights
More
Sources
- Emisar D4K: specs from Emisar product page (manufacturer). Price $39.69 from intl-outdoor.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.
Found an error? Email [email protected] and we will fix it.