Emisar D1K vs Olight ArkTac size comparison
The Olight ArkTac is 21.5 mm (0.85 in) longer than the Emisar D1K, and 6 mm narrower at its widest point. Weights are published on different bases (with battery vs without battery), so compare them with care.
Olight ArkTac: Photo: Olight · Image policy
The Olight ArkTac is 21.5 mm (0.85 in) longer than the Emisar D1K, and 6 mm narrower at its widest point. Weights are published on different bases (with battery vs without battery), so compare them with care.
Dimensions
| Emisar D1K Check price ↗ | Olight ArkTac Check price ↗ | |
| Length | 114 mm (4.49 in) | 135.5 mm (5.33 in)+21.5 mm |
| Head / width | 35 mm (1.38 in) | 29 mm (1.14 in)−6 mm |
| Body | 26.5 mm (1.04 in) | — |
| Thickness | — | 17 mm (0.67 in) |
| Weight | 89 g without battery | 136 g with battery |
| Battery | 21700 | Built-in |
| Max output | 1,200 lm | 1,700 lm |
| Throw | — | 205 m |
| Type | EDC | EDC |
| Price | $39.95 at intl-outdoor.com, as of Nov 4, 2026 | $119.99 at olight.com, as of Nov 4, 2026 |
| Source | intl-outdoor.com sourced Pocket thrower; lumens for SFT-25 | olight.com sourced |
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
D1K vs ArkTac: how they differ
Size and weight
The Emisar D1K is the shorter light: 114 mm (4.49 in) against 135.5 mm (5.33 in), a difference of 21.5 mm (16%). At its widest point the Olight ArkTac is 6 mm slimmer (29 vs 35 mm). Weights are published on different bases (Emisar D1K: 89 g without battery; Olight ArkTac: 136 g with battery), so they are not directly comparable.
Brightness and throw
The Olight ArkTac is rated brighter: 1,700 lm maximum vs 1,200 lm for the Emisar D1K, 42% more.
Battery
The Emisar D1K runs on a removable 21700 battery; the Olight ArkTac runs on a built-in rechargeable battery. Only the Emisar D1K lets you swap in a charged spare.
Price
When we checked on Nov 4, 2026, the Emisar D1K was $39.95 at intl-outdoor.com and the Olight ArkTac $119.99 at olight.com, so the Emisar D1K cost $80.04 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 Emisar D1K if you want a shorter light (21.5 mm shorter) and a removable cell you can swap. Choose the Olight ArkTac if you want a slimmer profile (6 mm narrower), more output (1,700 lm vs 1,200 lm) and a built-in battery with no separate cell to buy. We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Emisar D1K Check price ↗ Olight ArkTac
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
D1K vs ArkTac FAQ
Which is smaller, the Emisar D1K or the Olight ArkTac?
The Emisar D1K is the shorter light: 114 mm (4.49 in) against 135.5 mm (5.33 in), a difference of 21.5 mm (16%). At its widest point the Olight ArkTac is 6 mm slimmer (29 vs 35 mm). Weights are published on different bases (Emisar D1K: 89 g without battery; Olight ArkTac: 136 g with battery), so they are not directly comparable.
Which is brighter, the Emisar D1K or the Olight ArkTac?
The Olight ArkTac is rated brighter: 1,700 lm maximum vs 1,200 lm for the Emisar D1K, 42% more.
Which is cheaper, the Emisar D1K or the Olight ArkTac?
When we checked on Nov 4, 2026, the Emisar D1K was $39.95 at intl-outdoor.com and the Olight ArkTac $119.99 at olight.com, so the Emisar D1K cost $80.04 less. Prices change often, so check the current price before you buy.
Do the Emisar D1K and Olight ArkTac use the same battery?
The Emisar D1K runs on a removable 21700 battery; the Olight ArkTac runs on a built-in rechargeable battery. Only the Emisar D1K lets you swap in a charged spare.
Compare Emisar D1K with similar lights
Compare Olight ArkTac with similar lights
More
Sources
- Emisar D1K: specs from Emisar product page (manufacturer). Drawing: outline from published specs. Price $39.95 from intl-outdoor.com, checked Nov 4, 2026; prices change often.
- Olight ArkTac: specs from Olight product page (manufacturer). Photo from manufacturer: the maker's own product photo with the background removed, scaled to the published length and diameter (Photo: Olight; image policy). Price $119.99 from olight.com, checked Nov 4, 2026; prices change often.
Found an error? Email contact@flashlighthero.com and we will fix it.