Olight Arkfeld Ultra vs Streamlight ProTac 2L-X USB size comparison
The Streamlight ProTac 2L-X USB is 10.6 mm (0.42 in) longer than the Olight Arkfeld Ultra, with about the same max diameter/width. It is 6 g heavier (with battery).
The Streamlight ProTac 2L-X USB is 10.6 mm (0.42 in) longer than the Olight Arkfeld Ultra, with about the same max diameter/width. It is 6 g heavier (with battery).
Dimensions
| Olight Arkfeld Ultra Check price ↗ | Streamlight ProTac 2L-X USB Check price ↗ | |
| Length | 120 mm (4.72 in) | 130.6 mm (5.14 in)+10.6 mm |
| Head / width | 27 mm (1.06 in) | 26.9 mm (1.06 in)−0.1 mm |
| Body | — | 23.9 mm (0.94 in) |
| Thickness | 16 mm (0.63 in) | — |
| Weight | 119 g with battery | 125 g with battery+6 g |
| Battery | Built-in | 18650 / 2x CR123A |
| Max output | — | 500 lm |
| Throw | 103 m | — |
| Type | EDC | EDC |
| Price | $119.99 at olight.com, as of Nov 4, 2026 | $83.05 at batteryjunction.com, as of Nov 4, 2026 |
| Source | olight.com sourced Max output not shown in spec block | batteryjunction.com sourced |
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Arkfeld Ultra vs ProTac 2L-X USB: how they differ
Size and weight
The Olight Arkfeld Ultra is the shorter light: 120 mm (4.72 in) against 130.6 mm (5.14 in), a difference of 10.6 mm (8%). At their widest points they are about the same (27 vs 26.9 mm). The Olight Arkfeld Ultra is 6 g lighter (119 g vs 125 g, with battery).
Brightness and throw
The Streamlight ProTac 2L-X USB is rated at 500 lm; we have no published maximum for the Olight Arkfeld Ultra.
Battery
The Olight Arkfeld Ultra runs on a built-in rechargeable battery; the Streamlight ProTac 2L-X USB runs on removable 18650 / 2x CR123A batteries. Only the Streamlight ProTac 2L-X USB lets you swap in a charged spare.
Price
When we checked on Nov 4, 2026, the Olight Arkfeld Ultra was $119.99 at olight.com and the Streamlight ProTac 2L-X USB $83.05 at batteryjunction.com, so the Streamlight ProTac 2L-X USB cost $36.94 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 Arkfeld Ultra if you want a shorter light (10.6 mm shorter) and a built-in battery with no separate cell to buy. Choose the Streamlight ProTac 2L-X USB if you want 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 Arkfeld Ultra Check price ↗ Streamlight ProTac 2L-X USB
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Arkfeld Ultra vs ProTac 2L-X USB FAQ
Which is smaller, the Olight Arkfeld Ultra or the Streamlight ProTac 2L-X USB?
The Olight Arkfeld Ultra is the shorter light: 120 mm (4.72 in) against 130.6 mm (5.14 in), a difference of 10.6 mm (8%). At their widest points they are about the same (27 vs 26.9 mm). The Olight Arkfeld Ultra is 6 g lighter (119 g vs 125 g, with battery).
Which is cheaper, the Olight Arkfeld Ultra or the Streamlight ProTac 2L-X USB?
When we checked on Nov 4, 2026, the Olight Arkfeld Ultra was $119.99 at olight.com and the Streamlight ProTac 2L-X USB $83.05 at batteryjunction.com, so the Streamlight ProTac 2L-X USB cost $36.94 less. Prices change often, so check the current price before you buy.
Do the Olight Arkfeld Ultra and Streamlight ProTac 2L-X USB use the same battery?
The Olight Arkfeld Ultra runs on a built-in rechargeable battery; the Streamlight ProTac 2L-X USB runs on removable 18650 / 2x CR123A batteries. Only the Streamlight ProTac 2L-X USB lets you swap in a charged spare.
Compare Olight Arkfeld Ultra with similar lights
Compare Streamlight ProTac 2L-X USB with similar lights
More
Sources
- Olight Arkfeld Ultra: specs from Olight product page (manufacturer). Price $119.99 from olight.com, checked Nov 4, 2026; prices change often.
- Streamlight ProTac 2L-X USB: specs from manufacturer published specs as listed by batteryjunction.com. Price $83.05 from batteryjunction.com, checked Nov 4, 2026; prices change often.
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