Sofirn SC18 vs Sofirn SC31 Pro size comparison
The Sofirn SC31 Pro is 16 mm (0.63 in) longer than the Sofirn SC18, and 0.7 mm wider at its widest point. It is 4 g heavier (without battery).
The Sofirn SC31 Pro is 16 mm (0.63 in) longer than the Sofirn SC18, and 0.7 mm wider at its widest point. It is 4 g heavier (without battery).
Dimensions
| Sofirn SC18 Check price ↗ | Sofirn SC31 Pro Check price ↗ | |
| Length | 101.5 mm (4.00 in) | 117.5 mm (4.63 in)+16 mm |
| Head / width | 24.7 mm (0.97 in) | 25.4 mm (1.00 in)+0.7 mm |
| Weight | 55 g without battery | 59 g without battery+4 g |
| Battery | 18650 | 18650 |
| Max output | — | 2,000 lm |
| Throw | — | — |
| Type | EDC | EDC |
| Source | flashlightgo.com sourced Only head diameter listed | sofirnlight.com sourced Only head diameter listed |
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SC18 vs SC31 Pro: how they differ
Size and weight
The Sofirn SC18 is the shorter light: 101.5 mm (4.00 in) against 117.5 mm (4.63 in), a difference of 16 mm (14%). At its widest point the Sofirn SC18 is 0.7 mm slimmer (24.7 vs 25.4 mm). The Sofirn SC18 is 4 g lighter (55 g vs 59 g, without battery).
Brightness and throw
The Sofirn SC31 Pro is rated at 2,000 lm; we have no published maximum for the Sofirn SC18.
Battery
Both run on a removable 18650 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 Sofirn SC18 if you want a shorter light (16 mm shorter). On the specs we track, the Sofirn SC18 is ahead or level everywhere; the Sofirn SC31 Pro 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 ↗ Sofirn SC31 Pro
SC18 vs SC31 Pro FAQ
Which is smaller, the Sofirn SC18 or the Sofirn SC31 Pro?
The Sofirn SC18 is the shorter light: 101.5 mm (4.00 in) against 117.5 mm (4.63 in), a difference of 16 mm (14%). At its widest point the Sofirn SC18 is 0.7 mm slimmer (24.7 vs 25.4 mm). The Sofirn SC18 is 4 g lighter (55 g vs 59 g, without battery).
Do the Sofirn SC18 and Sofirn SC31 Pro use the same battery?
Both run on a removable 18650 battery, so spare cells work in either light.