Olight Arkfeld Pro

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Olight Arkfeld Pro specs

Brand & Model	Olight Arkfeld Pro
Flashlight category	EDC
LED	Osram P9, Luminus SST-10-UV, green laser
Max. output	1,300 lumens
Max. beam distance	102 meters
Max. beam intensity	2,608 cd
Battery config.	Built-in
Onboard charging	Yes, Olight MCC
Main modes	5
Blinkies	Strobe
Waterproof	IPX7
Review publication date	October 2023

Olight has a pretty broad selection of lights. They make some great keychain lights such as the i3E EOS and the i1R 2 Pro. Olight also has EDC flashlights like the Baton series. But that’s not all… gun lights, tactical lights, high-power lights, general lamps/lanterns, and now branching out into things like knives and pens. For the most part, if it needs to be lit up, Olight has you covered. One of the things I love most about Olight is their attention to detail. Quality is generally fantastic, anodizing and machining are great… they just know how to make a solid product.

This particular model – the Olight Arkfeld Pro – is the third version in the relatively new and popular line of Arkfeld models. There’s the original Arkfeld – a flat flashlight that let you quickly switch between white LED and a green laser. Then Olight switched it up with the Arkfeld UV, replacing the laser model with a UV LED. But what if you wanted both UV and a green laser? That’s when you reach for the brand new Arkfeld Pro! It has a white LED, green laser, and a UV LED. The Olight Arkfeld Pro is a nicely portable EDC light that is honestly a bit intriguing. It’s pocketable, it’s rechargeable, it’s easy to use, and well… I gotta leave something for the rest of the review so please read on!

The Arkfeld Pro arrives in lockout mode, so press and hold the center button for around 1 second to unlock the flashlight.

Package quality.

Some Olights come in fantastic heavy-duty two-part nested containers with splashy images of the light inside and meticulously arranged contents. Other lights, like some of the more EDC models, come in nice, but not overdone, packaging that feel like less of a presentation case and more of an actual carton to be recycled. The Arkfeld Pro came in one of the latter packages. It’s nice, clean, and gets the point across without investing too much in the box. Sliding out the inner, formed plastic tray reveals:

• Olight Arkfeld Pro
• Magnetic charging cable
• Manual

Like I mentioned in the Intro, the Olight Arkfeld Pro is the third Arkfeld iteration. I’d say that the Arkfeld line of lights is something truly new and unique. While most flashlights are pretty basic cylindrical (or cylindrical with cones at the end) kind of affairs, the Arkfeld is a self-contained light with an integral battery and charging, unique shape, and intuitive mode switching between white light,UV, and green laser. The original Arkfeld featured a white LED and a laser. Then Olight released the Arkfeld UV, which as you can guess, traded the laser module for a UV LED. But what if you want both UV and a laser? Well then, you want the new Arkfeld Pro!

Like when I described the Arkfeld originally, I would say that it doesn’t look like a flashlight at first blush. It bears strong resemblance to a small remote for a TV streaming stick (think Roku or Fire TV) more than anything else. The Arkfeld Pro is a fairly flat, rectangle looking thing except that it is rounded a bit on the top and bottom to make it feel more natural in your hand. Like on the Arkfeld UV, there is some texture added to the sides of the light. These grippy areas remind me a lot of indents that you would find on a pistol’s slide. This can help with traction if you go to remove the light from your pocket, for example. The Pro model also uses the same kind of two-way clip that’s found on the UV model.

What has changed, physically speaking? Dimensions. While online the Pro may look similar to its older brothers, it is bigger in every direction, including being an extra 10mm longer. It is also 28% heavier. This shouldn’t come as a surprise though – we now have 3 light sources instead of 2, not to mention the 43% increase in battery capacity.

The switch is a bit interesting, though just like its predecessors. It consists of an outer ring and a center button. The outer ring is referred to as the “selector”, as it allows you to switch between the white LED, laser, and a UV LED. The ring rotates between three positions, as etched into the body. Point the selector to the left, and you get UV light. Orient it to the middle, and you get a green laser. Rotate it to the right and you get the white LED output. The ring has two nubs on top that help you to easily rotate it with your thumb. The center button is an e-switch that controls the usual stuff like on/off, mode changes, lockout, etc.

This light is very much an EDC kinda light. Having 1300 lumens of moderately floody light is good for things like around the house/office, out for a walk, etc. Oh, and that UV light? It’s actually 365nm which is awesome for a lot of detection scenarios: currency validation, stain detection, etc. And the green laser can be good for presentations, feline playtime, or keeping the kids occupied (I’m not sure about yours, but mine chase that green dot just like a cat would).

The Arkfeld Pro is well built, as I would expect, and is constructed mostly of AL6061-T6 aluminum with a nice anodized coating. Mine happens to be the limited edition Zombie Green, which is pretty sharp looking. The extra bits of the light (retaining ring, selector, button, and clip) are made from stainless steel.

Effective September 16th, 2023, Olight changed their warranty policy – and it’s a good one. Most lights used to carry a 2 year or 5 year warranty. Now, Olight covers their products purchased after January 1st, 2023 (in select countries) with a lifetime warranty. That guarantee even covers built-in batteries, which is great news for products like the Arkfeld which don’t have user-replaceable batteries.

From Olight’s website:

If you purchased an Olight® product from the USA after January 1st, 2023, the local service centers will honor your LIFETIME WARRANTY for your purchase. If your Olight product (including its structure, built-in battery, LED, or lens) ever experiences any issues, we promise to take care of it. If we are unable to repair your product, we will promptly replace it with a product in perfect working condition, which will be of equal or better physical condition. If your purchase is a limited or discontinued edition of Olight product, we will repair or replace it with another Olight product of the same or higher value.

It used to be that people hated on Olight for offering nothing but cool white emitters. Thankfully, those days are behind us; Olight offers neutral white versions of most of their recent flashlights. Sure, some of you may still be holding out for High CRI… time will tell on that one. The Arkfeld Pro is offered in both Cool White (5700-6700K) and Neutral White (4000K-5000K) options. The LED version is clearly labeled on the underside of the flashlight. This primary LED is an OSRAM P9, which isn’t anything particularly special, but is perfectly fine.

The UV LED is a Luminus SST-10-UV, rated at 900mW of power (stepping down to 560mW), and is spec’ed as having a 5h 15min runtime. The wavelength clocks in at 365nm, which is my preferred UV wavelength as it seems to do the best with getting common objects to fluoresce. I tried using the Arkfeld Pro to illuminate the security strip in a US $20 bill and it was able to do so just fine. I was also shocked at some of the things I found in my house when I took a stroll with the Arkfeld at night – some things I’d probably rather not know about. I will say that though I do like the 365nm choice, this isn’t the perfect UV light. The clear glass allows a certain amount of white light to shine through. If you’re looking for peak UV performance, you might need to check out something with a ZWB2 filter. But for everyday usage, I feel like the Arkfeld Pro is great.

Last up is the green laser module. It comes in two variants: a Class 3R (<= 5mW) and a Class 1 (<= 0.39mW) laser, depending on the country you buy in. While my original Arkfeld had a Class 1 laser, this sample has a Class 3R and it’s very bright. I am certainly no expert in lasers, but I bet Olight has the different versions for different countries. It looks like many countries may not allow Class 3 lasers.

Spectral measurements: 

I used a Opple Light Masteer to measure the flashlight. 

Mode:	CCT:	CRI Ra:	duv
Turbo	6093 K	70.0	+0.0043

Dimensions: 

Olight Arkfeld Pro	Millimeters	Inches
Length	120 mm	4.7 in
Width	27 mm	1.1 in
Thickness	16 mm	0.6 in

Dimensions are rounded to the nearest millimeter, and to the nearest tenth of an Inch.

Weight: 

Olight Arkfeld Pro	Weight in grams	Weight in oz
With built-in battery	111 g	3.9 oz

Weight is rounded to the nearest gram, and to the nearest tenth of an Oz.

Flashlight size comparison with its competition:

Group 1: Olight Arkfeld Pro, Olight Arkfeld UV

Group 2: Wurkkos TS10, Olight Arkfeld Pro, Fenix LD12R, Acebeam Pokelit AA Cu

Aside from the light source selector ring, the UI is pretty standard stuff and easy to get the hang of if you’ve spent any amount of time with an e-switch light.

Available modes: 

• Moon, Low, Med, High, Turbo

Available blinky modes:

• Strobe
  

From OFF:

• Press and Hold 1 second: Moon
• Press and Hold 2+ seconds: Lockout
• Single click: turn On
• Double click: Turbo
• 3 clicks: Strobe

From ON:

• Press and Hold: change modes (Low > Med > High)
• 1 click: turn Off
• Double click (white light): Turbo
• Double click (laser): white light High mode + laser
• Double click + hold (press & release, press & hold): activate timer
• 3 clicks: Strobe

Mode memory:

• If you turn the light back on within 1 minute of turning it off in Turbo or High, it will come back on in the High
• After 1 minute of being off, Turbo and High modes revert down to Medium mode
• Moon and Low modes will be completely memorized
• Strobe mode cannot be memorized 

Shortcuts:

• To Moon: press and hold 1 second from Off
• To Turbo: double click (from Off or On)
• To Strobe: triple click (from Off or On)

Low voltage warning/protection:

• There are four LED spots below the selector ring that display the battery level:
  • 4 green LEDs lit: >75%
  • 3 green LEDs lit: 50-75%
  • 2 green LEDs lit: 25-50%
  • 1 green LED lit: 10-25%
  • 1 red LED lit: <10%
• When turning the Arkfeld on, the indicator lights do a nice sequential ramp up
• After being on for a few seconds, the indicator LEDs turn off (again, in a nice sequential pattern)
• When turning the Arkfeld off, the indicator LEDs turn on again for a few seconds, then turn back off

Strobe/blinkies

•  There is a strobe mode that can be activated with a triple click from Off or On

Lock-out mode: 

•  Electronic lockout mode is enabled by holding the button down for 2+ seconds while the light is off

PWM

• There is no PWM present

Additional/summary info on the UI: 

• It’s interesting that Olight lets you enable the white LED while the laser is turned on. I’m used to this option on weapon-mounted lights (like my Olight Baldr S BL), but I’m not exactly sure what the use case would be on an EDC light. Regardless, it never hurts to have that as an option.
• There is also a neat Timer mode, as seen on other Olights.
  • With the light on and in your desired mode, do a double click + hold (press & release, press & hold) until you see a blink. 
  • One blink means that you activated a 3 minute timer. 
  • Two blinks means that you activated a 9 minute timer.
  • To switch between the 3 minute and 9 minute timers, after you’ve activated the timer, do another double click + hold.
  • Your timer preference (3 minutes versus 9 minutes) will be memorized for next time.

The Olight Arkfeld Pro uses a built-in battery. Olight says that the capacity of the battery is 5.55 Wh (1500 mAh / 3.7 V). Olight says the charge rate using the supplied MCC (magnetic charging cable) is 1 amp and a charge cycle should take around 2 hours. My tests showed that to hold true, observing a charge rate of 0.88 amps (4.53W) and taking 2h 43min to complete the charge cycle.

Charge type	Fits	No fit	Charge time
Olight MCC	Built-in	N/A	2h 43min

Lumen measurements

How Lumens are Measured: Understanding ANSI FL1 Standards How Lumens are Measured: Understanding ANSI FL1 Standards: The ANSI FL1 standards specify that output in lumens should be measured 30 seconds after turning on, as this is the standardized time for measuring brightness according to the industry standard. This is why we focus on this part in our measurements. The ANSI FL1 standards require an ambient temperature of 22 ± 3°C. We record the ambient the ambient temperature to identify potential reasons for any observed discrepancies.

Lux was measured by a UNI-T UT383 BT at 5 meters. Lumens were measured in a homemade lumen tube using a VEML7700 sensor, calibrated with a calibration light provided by 1Lumen. Due to the built-in nature of the battery, current tests were not possible.

Mode	Specs	@turn on	30 sec	10 minutes
Moon	1 lm	–	–	–
Low	15 lm	–	–	–
Med	100 lm	82 lm	82 lm	82 lm
High	420 lm	398 lm	397 lm	397 lm
Turbo	1300 lm	1290 lm	1264 lm	394 lm

Parasitic drain:

• N/A – couldn’t test due to built-in battery design

In my testing of the other Arkfeld models, I observed output that was around 10% under spec. I’m happy to report that with the Arkfeld Pro, my measurements are really close to spec – good enough for me. Overall, no real surprises here. At 3 minutes, Turbo starts slowly ramping down to the High level.

Olight Arkfeld Pro Battery Life: Runtime graphs

How Runtimes are Measured: Understanding ANSI FL1 Standards About ANSI FL1 runtime standards: The runtime is measured until the light drops to 10% of its initial output (30 seconds after turning on). This does not mean that the flashlight is not usable anymore. The last column shows how long the light actually works till it shuts off. If there is a + symbol, it means that the test was stopped at that particular point, but the light was actually still running. This happens on certain occasions, with certain drivers, firmware, or batteries.

Mode	Specified runtime	Measured runtime ANSI	Time till shut off
Moon	11 days	–	–
Low	55h	–	–
Med	9h 45min	10h 1min	10h 1min
High	2h 27min	2h 28min	2h 28min
Turbo	2h 10min	2h 7min	2h 15min
UV	5h 15min	–	–
Laser – Class 3R model	61h	–	–
Laser – Class 1 model	174h	–	–

Overall, the runtime durations are really consistent with the Olight specs. The larger battery in the Arkfeld Pro lets it run for just as long (or longer) than the original and UV models, even with increased output.

Peak beam intensity and beam distance measurements

About Peak beam intensity: Understanding ANSI FL1 Standards About peak beam intensity The calculated value of distance in meters at which the flashlight produces a light intensity of 0.25 lux. (0.25 lux is about the brightness of a full moon shining on an object). This means that the intensity has decreased so much, it becomes difficult to see darker objects, or objects that don’t reflect light. The columns ‘Meters’ and ‘Yards’ use rounded numbers.

Intensity was measured at 5 meters after being turned on for 30 seconds. Since candela values for Low and Medium are low, those were measured at 1 meters. A UNI-T UT383 BT lux meter was used.

Mode	Specs	Candela measured	Meters	Yards
Moon	1 cd	–	–	–
Low	31 cd	29 cd	11 m	12 yd
Medium	210 cd	184 cd	27 m	30 yd
High	971 cd	925 cd	61 m	67 yd
Turbo	2,608 cd	2,925 cd	108 m	118 yd

My beam intensity numbers closely match Olight’s claims. The Arkfeld Pro has a similar intensity as the original Arkfeld (2,560 cd). The Arkfeld UV, for some reason, has a lower intensity (1,808 cd) – not wildly different, but noticeable.

Beam shots of the building are taken at 30 m (33 yd) using a Pixel 7 set to ISO 800 with 1/10 second exposure time

Beamshots of the following flashlights compared:

• Olight Arkfeld Pro
• Olight Arkfeld UV
• Olight Seeker 4 Mini
• Fenix LD12R

Please note that beamshots are mainly intended to showcase the beam pattern and beam quality, rather than overall performance. These images are typically taken directly after activation, and do not fully represent its overall performance. For accurate performance metrics, such as output, beam distance, and runtimes, you need to look at the performance section of this review.

Disclaimer: This flashlight was sent to us for review at no cost by Olight. We have not been paid to review, nor have we been holding back on problems or defects.