Olight ArkPro vs Streamlight ProTac 2L-X USB size comparison
The Streamlight ProTac 2L-X USB is 6.6 mm (0.26 in) longer than the Olight ArkPro, with about the same max diameter/width. It is 10 g heavier (with battery).
The Streamlight ProTac 2L-X USB is 6.6 mm (0.26 in) longer than the Olight ArkPro, with about the same max diameter/width. It is 10 g heavier (with battery).
Dimensions
| Olight ArkPro Check price ↗ | Streamlight ProTac 2L-X USB Check price ↗ | |
| Length | 124 mm (4.88 in) | 130.6 mm (5.14 in)+6.6 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 | 115 g with battery | 125 g with battery+10 g |
| Battery | Built-in | 18650 / 2x CR123A |
| Max output | 1,500 lm | 500 lm |
| Throw | 205 m | — |
| Type | EDC | EDC |
| Price | $109.99 at olight.com, as of Nov 4, 2026 | $83.05 at batteryjunction.com, as of Nov 4, 2026 |
| Source | olight.com sourced | batteryjunction.com sourced |
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
ArkPro vs ProTac 2L-X USB: how they differ
Size and weight
The Olight ArkPro is the shorter light: 124 mm (4.88 in) against 130.6 mm (5.14 in), a difference of 6.6 mm (5%). At their widest points they are about the same (27 vs 26.9 mm). The Olight ArkPro is 10 g lighter (115 g vs 125 g, with battery).
Brightness and throw
The Olight ArkPro is rated brighter: 1,500 lm maximum vs 500 lm for the Streamlight ProTac 2L-X USB, 200% more.
Battery
The Olight ArkPro 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 ArkPro was $109.99 at olight.com and the Streamlight ProTac 2L-X USB $83.05 at batteryjunction.com, so the Streamlight ProTac 2L-X USB cost $26.94 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 ArkPro if you want a shorter light (6.6 mm shorter), less weight (10 g lighter), more output (1,500 lm vs 500 lm) 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 ArkPro Check price ↗ Streamlight ProTac 2L-X USB
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
ArkPro vs ProTac 2L-X USB FAQ
Which is smaller, the Olight ArkPro or the Streamlight ProTac 2L-X USB?
The Olight ArkPro is the shorter light: 124 mm (4.88 in) against 130.6 mm (5.14 in), a difference of 6.6 mm (5%). At their widest points they are about the same (27 vs 26.9 mm). The Olight ArkPro is 10 g lighter (115 g vs 125 g, with battery).
Which is brighter, the Olight ArkPro or the Streamlight ProTac 2L-X USB?
The Olight ArkPro is rated brighter: 1,500 lm maximum vs 500 lm for the Streamlight ProTac 2L-X USB, 200% more.
Which is cheaper, the Olight ArkPro or the Streamlight ProTac 2L-X USB?
When we checked on Nov 4, 2026, the Olight ArkPro was $109.99 at olight.com and the Streamlight ProTac 2L-X USB $83.05 at batteryjunction.com, so the Streamlight ProTac 2L-X USB cost $26.94 less. Prices change often, so check the current price before you buy.
Do the Olight ArkPro and Streamlight ProTac 2L-X USB use the same battery?
The Olight ArkPro 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 ArkPro with similar lights
Compare Streamlight ProTac 2L-X USB with similar lights
More
Sources
- Olight ArkPro: specs from Olight product page (manufacturer). Drawing: shape measured from manufacturer photo (batteryjunction.com), scaled to the published length and diameter. Price $109.99 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. Drawing: outline from published specs. Price $83.05 from batteryjunction.com, checked Nov 4, 2026; prices change often.
Found an error? Email liambuehlerbusiness@gmail.com and we will fix it.