Olight Arkfeld Pro Review: Three Lights in One Flat Body
The short version: A flat, pocket-hugging EDC light with a circular selector that swaps between white light, UV, and a green beam. The white output is genuinely capable — 1,300 lumens and 102 m — and the UV emitter is the real 365 nm professional grade. You pay Olight prices for the privilege, and the sealed battery means a dead cell ends the light.
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Who this light is for
The Arkfeld Pro answers a question nobody asked out loud: what if a flashlight, a UV inspection light, and a presentation pointer were one object? For most people that answer is unnecessary. For a surprising number of people — inspectors, technicians, cat owners, anyone who checks documents or finds pet stains — it's the light they reach for daily, because three tools in one pocket beats three tools in a drawer.
The flat format is the quiet masterstroke. A 120 mm × 27 mm × 16 mm slab carries slimmer than any round light of equal output; it sits in the fifth pocket like a knife, doesn't roll off tables, and the clip makes it bezel-up invisible. If you've never carried a flat light, this is the one that converts people.
If you just want a bright flashlight, skip the multi-source gimmick and buy the Baton 4 for less money. The Arkfeld Pro earns its price only if you'll actually use the UV and the beam.
Specifications
All figures below are Olight's published ratings, not our measurements.
| Maximum output | 1,300 lumens (white, P9 emitter) |
| Beam distance | 102 m |
| Max runtime | 55 hours (low) |
| UV | 365–370 nm SST-10, up to 900 mW — the real professional wavelength |
| Green beam | 520 nm, ≤5 mW (Class 3R laser) |
| Selector | Rotating ring — white / UV / beam |
| Switch | Stainless center button, 5 white brightness levels |
| Battery | Sealed Li-po (built in, not replaceable) |
| Charging | MCC1A magnetic cable (included) |
| Water resistance | IPX7 |
| Size | 120 mm × 27 mm × 16 mm |
| Weight | 111 g with battery |
| Body | AL6061-T6 aluminum, stainless selector/clip |
The circular selector is the interface done right
Most multi-source lights bury their extra emitters in menus. Olight's answer is physical: a knurled stainless ring rotates between the three sources with a click you can feel, and the center button powers whatever the ring points at. There is nothing to remember and nothing to misfire in a pocket — the light always comes on in the source you selected last.
The white side has five brightness levels stepped through the button, and the light ships in lockout mode with a red indicator confirming it — press and hold to unlock. Between lockout, the physical selector, and the pocket-friendly slab shape, this is one of the few high-output lights you can genuinely carry unlocked.
The UV is the real reason to upgrade
Plenty of lights bolt on a 395 nm UV LED as an afterthought — the cheap kind that makes everything glow faintly purple. The Arkfeld Pro carries a 365 nm SST-10 at up to 900 mW, and the difference is not subtle: 365 nm is the wavelength scorpions, pet stains, HVAC leaks, and counterfeit markers actually respond to, with far less visible purple wash. It's the same class of emitter sold in dedicated inspection lights.
The green beam is the party trick — a ≤5 mW Class 3R laser useful for pointing at ceiling stains, presentation screens, or a dog's attention across a yard. It's a tool, not a flashlight, and Olight is careful to label the class correctly. Check local rules before carrying it around; laser pointers of any class aren't welcome everywhere.
Carrying it
At 111 g and 16 mm thick, this is the light that disappears in a jacket's inner pocket and stays put in jeans. The stainless pocket clip is tensioned well and doubles as a hat-brim mount for hands-free use, same as the round Batons. The magnetic tailcap sticks it to a car hood or a breaker panel, and MCC1A charging snaps on without looking — same cable as the rest of the modern Olight line.
IPX7 covers rain and brief submersion, though it's one step below the IPX8 of the Baton 4. The flat body won't roll, which matters more than it sounds if you've ever watched a $90 light bounce off a workbench.
Where it falls down
The battery is sealed and the reviews mention it. The Li-po is permanently built in, and a non-trivial number of buyers report cells that stopped charging within months. Olight's warranty covers it, but a warranty claim means shipping a light, not swapping a cell. That's the structural trade of the flat format.
The 1,300-lumen figure is a burst. A slab this thin has almost no thermal mass; turbo steps down quickly and the honest sustained figure is a fraction of it. Several reviewers estimate real sustained output nearer 800 lumens. Plan around the mid levels — they're where this light lives.
Value splits opinion. At $90 this costs more than the Baton 4 Pro, which is brighter (1,600 lm) and IPX8, in a rounder but still pocketable body. The Arkfeld Pro's case is the UV + beam + flat carry, not raw output per dollar.
No neutral-white default. The standard listing is cool white (5700–6700K); the neutral 4000–5000K variant is a separate listing, so check which one is in your cart.
Pros
- Genuine 365 nm UV — the useful kind, not a gimmick
- Flat profile carries better than anything round at this output
- Circular selector — the best multi-source interface on the market
- 1,300-lumen burst with a real 102 m throw
- Lockout + physical selector = pocket-safe by design
Cons
- Sealed battery — some units fail early, warranty is your only recourse
- Turbo steps down hard on a body this thin
- IPX7, not the IPX8 of cheaper Olight siblings
- $90+ before you add the optional holster
What to buy instead
| If you want… | Buy this | Why |
|---|---|---|
| More output, same brand | Baton 4 Pro | 1,600 lm, IPX8, cheaper |
| A flat light without the extras | Streamlight Wedge | 1000 lm flat, duty-brand pedigree |
| Maximum light per dollar | ArkPro Lite | 1,200 lm flat with UV + red for $70 |
| Search-light output | Seeker Ultra | 4,800 lm when the job is huge |
The verdict
The Arkfeld Pro is the best-designed multi-source flashlight on the market, and the only one where the "extra" emitters are the point rather than the filler. The UV is genuinely professional-grade, the selector is a joy to use, and the flat body is the best-carrying format Olight makes.
Buy it if you'll use at least two of the three sources weekly — for that buyer, it's a 4.5-star tool that replaces a drawer of gadgets. If you only need light, the same money buys a brighter, more waterproof Baton 4 Pro, and the honest answer for most people is that the Arkfeld Pro's cool factor is doing part of the selling.
Frequently asked questions
Is the Arkfeld Pro's UV actually useful, or a gimmick?
Genuinely useful. The 365 nm SST-10 emitter at 900 mW is the professional inspection wavelength — it makes pet stains, refrigerant leaks, UV markings, and counterfeit security features fluoresce far more distinctly than the cheap 395 nm LEDs most lights include. It's the same class of UV sold in dedicated inspection lights, built into the body.
Is the green beam legal to carry?
It's a ≤5 mW Class 3R laser — legal to own in most places but restricted in some jurisdictions and contexts (aviation proximity is a serious offense everywhere). It's a pointing tool, not a light source. Check your local rules, and don't point it at people, vehicles, or aircraft.
Can you replace the battery in the Arkfeld Pro?
No. The lithium-polymer cell is permanently sealed into the flat body — that's the trade for the slim format. A small number of owners report cells failing early; Olight's lifetime warranty covers it, but it means a warranty claim rather than a battery swap.
Arkfeld Pro vs. the newer ArkPro — which should I buy?
The Arkfeld Pro ($90) is the refined, proven pick: 1,300 lm, 102 m throw, circular selector. The ArkPro ($100) bumps to 1,500 lm and adds USB-C charging but the same IPX7 and sealed battery. The ArkPro Lite ($70) drops the green beam for a red light and costs less. Buy the Pro for the UV quality, the Lite if the green beam is expendable.