Olight Seeker 3 Pro vs Olight Seeker 4 size comparison
The Olight Seeker 4 is 2 mm (0.08 in) longer than the Olight Seeker 3 Pro, with about the same max diameter/width. It is 5 g heavier (with battery).
The Olight Seeker 4 is 2 mm (0.08 in) longer than the Olight Seeker 3 Pro, with about the same max diameter/width. It is 5 g heavier (with battery).
Dimensions
| Olight Seeker 3 Pro Check price ↗ | Olight Seeker 4 Check price ↗ | |
| Length | 132 mm (5.20 in) | 134 mm (5.28 in)+2 mm |
| Head / width | 35 mm (1.38 in) | 35 mm (1.38 in)same |
| Body | 28 mm (1.10 in) | 28 mm (1.10 in)same |
| Weight | 200 g with battery | 205 g with battery+5 g |
| Battery | 21700 | 21700 |
| Max output | 4,200 lm | 3,100 lm |
| Throw | 250 m | — |
| Type | EDC not on olight.com (US) | EDC not on olight.com (US) |
| Price | $139.95 at batteryjunction.com, as of Nov 4, 2026 | not verified yet |
| Source | batteryjunction.com sourced | batteryjunction.com sourced Retailer lists 400 m throw, which conflicts with Olight figures for the series; throw omitted |
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Seeker 3 Pro vs Seeker 4: how they differ
Size and weight
The Olight Seeker 3 Pro is the shorter light: 132 mm (5.20 in) against 134 mm (5.28 in), a difference of 2 mm (1%). At their widest points they are about the same (35 vs 35 mm). The Olight Seeker 3 Pro is 5 g lighter (200 g vs 205 g, with battery).
Brightness and throw
The Olight Seeker 3 Pro is rated brighter: 4,200 lm maximum vs 3,100 lm for the Olight Seeker 4, 35% more.
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 Olight Seeker 3 Pro if you want more output (4,200 lm vs 3,100 lm). On the specs we track, the Olight Seeker 3 Pro 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 3 Pro Check price ↗ Olight Seeker 4
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Seeker 3 Pro vs Seeker 4 FAQ
Which is smaller, the Olight Seeker 3 Pro or the Olight Seeker 4?
The Olight Seeker 3 Pro is the shorter light: 132 mm (5.20 in) against 134 mm (5.28 in), a difference of 2 mm (1%). At their widest points they are about the same (35 vs 35 mm). The Olight Seeker 3 Pro is 5 g lighter (200 g vs 205 g, with battery).
Which is brighter, the Olight Seeker 3 Pro or the Olight Seeker 4?
The Olight Seeker 3 Pro is rated brighter: 4,200 lm maximum vs 3,100 lm for the Olight Seeker 4, 35% more.
Do the Olight Seeker 3 Pro and Olight Seeker 4 use the same battery?
Both run on a removable 21700 battery, so spare cells work in either light.
Compare Olight Seeker 3 Pro with similar lights
Compare Olight Seeker 4 with similar lights
More
Sources
- Olight Seeker 3 Pro: specs from manufacturer published specs as listed by batteryjunction.com. Drawing: outline from published specs. Price $139.95 from batteryjunction.com, checked Nov 4, 2026; prices change often.
- Olight Seeker 4: specs from manufacturer published specs as listed by batteryjunction.com. Drawing: shape measured from manufacturer photo (batteryjunction.com), scaled to the published length and diameter. No verified price yet.
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