Sofirn SC18 vs Wurkkos TS21 size comparison
The Wurkkos TS21 is 11.9 mm (0.47 in) longer than the Sofirn SC18, and 3.3 mm wider at its widest point. It is 23 g heavier (without battery).
The Wurkkos TS21 is 11.9 mm (0.47 in) longer than the Sofirn SC18, and 3.3 mm wider at its widest point. It is 23 g heavier (without battery).
Dimensions
| Sofirn SC18 Check price ↗ | Wurkkos TS21 Check price ↗ | |
| Length | 101.5 mm (4.00 in) | 113.4 mm (4.46 in)+11.9 mm |
| Head / width | 24.7 mm (0.97 in) | 28 mm (1.10 in)+3.3 mm |
| Weight | 55 g without battery | 78 g without battery+23 g |
| Battery | 18650 | 21700 |
| Max output | — | 3,500 lm |
| Throw | — | — |
| Type | EDC | EDC |
| Price | from $19.99 at flashlightgo.com, as of Nov 4, 2026 | not verified yet |
| Source | flashlightgo.com sourced Only head diameter listed | wurkkos.com sourced Only head diameter listed |
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SC18 vs TS21: how they differ
Size and weight
The Sofirn SC18 is the shorter light: 101.5 mm (4.00 in) against 113.4 mm (4.46 in), a difference of 11.9 mm (10%). At its widest point the Sofirn SC18 is 3.3 mm slimmer (24.7 vs 28 mm). The Sofirn SC18 is 23 g lighter (55 g vs 78 g, without battery).
Brightness and throw
The Wurkkos TS21 is rated at 3,500 lm; we have no published maximum for the Sofirn SC18.
Battery
The Sofirn SC18 runs on a removable 18650 battery; the Wurkkos TS21 runs on a removable 21700 battery. For scale, a 18650 cell is about 18 × 65 mm and a 21700 about 21 × 70 mm (nominal).
Type
Both are EDC lights in our catalog with a tube body.
Which should you buy?
Choose the Sofirn SC18 if you want a shorter light (11.9 mm shorter), a slimmer profile (3.3 mm narrower) and less weight (23 g lighter). On the specs we track, the Sofirn SC18 is ahead or level everywhere; the Wurkkos TS21 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 ↗ Sofirn SC18 Check price ↗ Wurkkos TS21
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SC18 vs TS21 FAQ
Which is smaller, the Sofirn SC18 or the Wurkkos TS21?
The Sofirn SC18 is the shorter light: 101.5 mm (4.00 in) against 113.4 mm (4.46 in), a difference of 11.9 mm (10%). At its widest point the Sofirn SC18 is 3.3 mm slimmer (24.7 vs 28 mm). The Sofirn SC18 is 23 g lighter (55 g vs 78 g, without battery).
Do the Sofirn SC18 and Wurkkos TS21 use the same battery?
The Sofirn SC18 runs on a removable 18650 battery; the Wurkkos TS21 runs on a removable 21700 battery. For scale, a 18650 cell is about 18 × 65 mm and a 21700 about 21 × 70 mm (nominal).
Compare Sofirn SC18 with similar lights
Compare Wurkkos TS21 with similar lights
More
Sources
- Sofirn SC18: specs from manufacturer published specs as listed by flashlightgo.com. Price from $19.99 from flashlightgo.com, checked Nov 4, 2026; prices change often.
- Wurkkos TS21: specs from Wurkkos product page (manufacturer). No verified price yet.
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