Disclosure: Olight provided the ArkPro Ultra flashlight for the purpose of this review. All opinions and observations are my own. This article also contains affiliate links, which means I may earn a commission if you make a purchase through those links, at no additional cost to you.
Introduction: 22 Years of Working in the Mountains
For the past 22 years, I’ve worked professionally as a mountain guide, taking clients rock climbing, ice climbing, and mountaineering in New Hampshire’s White Mountains and beyond. I’m also an active volunteer on multiple New Hampshire search-and-rescue teams, responding to emergencies involving lost and injured people in the backcountry.
Over those years, I’ve accumulated plenty of experience with flashlights, headlamps, and other portable lighting systems. Whether navigating technical terrain after dark, working with climbing equipment, or participating in rescue operations, I’ve learned to appreciate dependable equipment that’s straightforward to operate.
When it comes to everyday carry (EDC), however, my priorities shift a little. I want a flashlight that’s powerful enough to be genuinely useful, small enough that I’ll actually carry it, and versatile enough to handle a variety of situations.
That’s where the Olight ArkPro Ultra comes in.
Combining a floodlight, spotlight, UV light, and green laser into a compact rectangular body, the ArkPro Ultra takes a different approach to the traditional pocket flashlight.
After carrying and using it, I’ve found quite a bit to like—and one feature I really wish Olight had included.
First Impressions: The Shape Is the Secret
The most immediately noticeable thing about the ArkPro Ultra is its unconventional shape.
Unlike traditional cylindrical flashlights, the ArkPro Ultra has a relatively flat, rectangular profile. Initially, that might seem like a cosmetic decision, but after carrying it, I’ve come to consider the design one of its biggest advantages.
Anyone familiar with EDC equipment understands the concept of printing—when the outline of something you’re carrying becomes visible through your clothing.
Traditional round flashlights can create an obvious bulge in a pants pocket. The ArkPro Ultra’s flatter design sits more naturally against the body, resulting in noticeably less printing.
In my experience, it’s also simply more comfortable to carry.
The sturdy two-way pocket clip provides several carrying options, allowing the light to ride securely inside a pocket or attach to other clothing and equipment.
It’s a small design difference that makes a surprisingly big impact on everyday usability.
Construction and Durability
The ArkPro Ultra feels like a premium piece of equipment.
Its body is manufactured from Olight’s proprietary O-aluminum alloy, which the company claims offers improved hardness and durability compared with conventional aluminum alloys.
Although I haven’t subjected it to destructive testing, the construction feels solid. The machining is clean, the controls are well integrated, and the textured side panels provide a secure grip.
The flashlight is also rated IPX7 for water resistance, meaning it is designed to withstand temporary immersion in water under specified conditions.
For anyone spending time outdoors in unpredictable weather, that level of protection is reassuring.
At approximately 4.9 inches long and weighing about 4.2 ounces, the ArkPro Ultra strikes a nice balance between compactness and substance.
The flat design also prevents it from rolling off surfaces, a surprisingly useful characteristic when working around vehicles or equipment.
Four Light Sources, One Flashlight
What makes the ArkPro Ultra particularly interesting is the combination of lighting options packed into its compact body.
Floodlight: Broad, Useful Illumination
The ArkPro Ultra’s floodlight delivers a maximum advertised output of 1,700 lumens.
Rather than concentrating its output into a narrow beam, floodlighting spreads light across a wider area, illuminating both the immediate foreground and surrounding environment.
This is particularly useful when working with equipment, walking through unfamiliar areas, or performing tasks where situational awareness matters more than seeing hundreds of feet into the distance.
Having spent considerable time traveling through the mountains after dark, I appreciate the value of a wide, even beam that lets you see more than just what’s directly ahead.
Spotlight: Reaching Into the Distance
The dedicated spotlight produces up to 800 lumens, with an advertised beam distance of approximately 205 meters, or 224 yards.
Those numbers are impressive for a flashlight of this size, but advertised beam distance and practical visibility aren’t necessarily the same thing.
There’s a substantial difference between detecting an object, recognizing a human silhouette, and positively identifying a person at distance.
To get a better sense of the ArkPro Ultra’s capabilities, I conducted a preliminary nighttime comparison using my son as a subject at the end of a dark, wooded road.
Switching between the flood and spotlight modes demonstrated their different strengths.
The floodlight provided broad illumination of the roadway and surrounding vegetation, while the spotlight concentrated its output on the distant subject, making him more prominent against the background.
I didn’t conduct a controlled, measured-distance test, so I won’t make specific claims about human detection or identification distances.
However, the comparison illustrated how useful it is to have two distinct beam patterns available in the same flashlight.
For outdoor recreation, nighttime navigation, and search-related applications, having both options available without carrying separate lights is a significant advantage.
UV Light: An Unexpectedly Useful Feature
The ArkPro Ultra incorporates a 365 nm UV light, which can reveal fluorescent materials and substances that aren’t readily visible under ordinary illumination.
Around my house in New Hampshire, the UV light mostly provides entertainment for the kids, although it can also be useful for inspecting various materials and surfaces.
Interestingly, it brought back memories of my time in the Marine Corps.
During desert warfare training at Twentynine Palms, California, scorpions were among the creatures we had to be mindful of.
Scorpions fluoresce under ultraviolet light, making them remarkably easy to spot in darkness.
I would have loved to have had a compact UV flashlight available during those exercises!
It’s not necessarily a feature everyone will use regularly, but having it integrated into a light you’re already carrying is a nice bonus.
Green Laser: Another Tool in the Toolbox
The fourth light source is an integrated green laser.
While it isn’t something I consider essential for everyday flashlight use, it has practical applications.
Pointing out a specific object, identifying a feature at a distance, or directing someone’s attention to something without physically approaching it are all examples.
I can see its usefulness in instructional settings, particularly when communicating with groups.
The laser can also be used in combination with the other lighting modes, expanding the flashlight’s versatility.
Naturally, appropriate precautions are necessary when using any laser, particularly around people’s eyes, vehicles, and aircraft.
Controls: Easy to Learn, Easy to Use
Packing this many functions into a compact flashlight could easily result in an unnecessarily complicated operating system.
Fortunately, Olight has done a good job keeping things intuitive.
The ArkPro Ultra uses a rotating mode selector surrounding a central activation button, along with a separate button for operating the green laser.
The selector provides quick access to the primary floodlight, spotlight, and UV modes without forcing you to cycle through numerous settings.
I experienced a very short learning period before the controls felt natural.
From my perspective, that’s important. Whether guiding clients or working with equipment in challenging conditions, I appreciate gear that doesn’t require unnecessary thought to operate.
What Do the Illuminated Indicators Mean?
One of my favorite design details is the illuminated control ring surrounding the activation button.
Olight uses two separate sets of indicators:
- White indicators on the left: Show the selected brightness level. More illuminated segments correspond to higher output settings.
- Green indicators on the right: Show remaining battery capacity. Four illuminated segments indicate a high charge level, with fewer segments appearing as the battery discharges. The lowest battery warning changes to red.
A sun icon identifies the brightness display, while a battery icon identifies the charge indicator.
This arrangement makes it easy to check your settings and available battery power at a glance.
The light also incorporates a lockout feature to prevent accidental activation while being carried.
It’s a thoughtfully designed system that gives you useful information without unnecessary complexity.
Hands-Free Lighting Without a Headlamp
One feature I’ve found particularly useful is the ability to attach the ArkPro Ultra to the brim of a baseball cap.
Thanks to its two-way pocket clip, the flashlight can function as an improvised headlamp, providing hands-free illumination.
As a mountain guide, I’ve spent countless hours wearing dedicated headlamps, and I certainly wouldn’t suggest replacing one for extended technical activities or nighttime mountain travel.
However, there are plenty of situations where you simply need both hands free for a few minutes.
Being able to take a flashlight that’s already in my pocket and clip it onto my hat is incredibly convenient.
The magnetic base provides another hands-free option, allowing attachment to suitable metal surfaces.
These are relatively simple design features, but they’re the sorts of things that increase the likelihood you’ll actually use a piece of equipment.
Battery Life and Charging
The ArkPro Ultra uses an integrated 2,000 mAh rechargeable battery.
One feature I especially appreciate is its two charging options.
The flashlight supports Olight’s magnetic charging system as well as conventional USB-C charging.
The magnetic connection is convenient at home, while USB-C makes charging easier when traveling or using equipment I already carry.
Olight advertises up to 14 days of runtime in its lowest-output moonlight setting. Obviously, runtime decreases significantly at higher output levels, and the most powerful modes step down in brightness as the light manages heat and power consumption.
I haven’t conducted an independent battery endurance test, so those figures should be considered manufacturer specifications rather than verified results from my testing.
Personally, I don’t consider the integrated battery a drawback. I’ve moved away from carrying spare batteries whenever possible, preferring to carry a portable power bank and charging cables that can recharge multiple devices.
Having USB-C charging built directly into the ArkPro Ultra fits perfectly with that approach. Rather than carrying spare batteries specifically for my flashlight, I can recharge it using the same power bank I carry for other electronics.
What Would I Change? Add a Red Light!
For all the ArkPro Ultra’s capabilities, there’s one omission I find surprising.
It doesn’t have a dedicated red-light mode.
Given its rugged design, green laser, UV capability, and obvious appeal to tactical and outdoor users, I would have expected Olight to include one.
Low-intensity red lighting can be particularly useful for preserving dark adaptation when reading maps, organizing equipment, or performing other tasks at night.
Red light isn’t a magical solution for maintaining night vision. Excessively bright red lighting can still negatively affect your eyes’ adaptation to darkness.
Nevertheless, a properly designed, low-output red mode would be a welcome addition for outdoor users, military personnel, and others who regularly operate after dark.
In fact, I would probably use a red-light feature more often than the green laser.
Interestingly, Olight does offer red lighting in its ArkPro Lite model, making its absence from the Ultra even more noticeable.
If I could suggest one improvement for the next generation, this would be it.
Final Verdict: An Excellent Everyday Carry Flashlight
After spending time with the Olight ArkPro Ultra, I’ve come away impressed.
Its greatest strength isn’t necessarily any single lighting mode or technical specification. It’s the combination of useful features packaged into a flashlight that’s genuinely convenient to carry.
The flat profile reduces pocket printing, the controls are intuitive, and having both floodlighting and spotlighting available makes it useful in a wide variety of situations.
The UV light, green laser, magnetic base, and dual charging options add further versatility.
From my perspective as a professional mountain guide and an active volunteer on multiple New Hampshire search-and-rescue teams, good equipment should solve problems without creating unnecessary complications.
The ArkPro Ultra does a good job of that.
Would I replace my dedicated mountaineering headlamp or specialized search-and-rescue lighting equipment with it? No, and I wouldn’t expect it to serve those roles.
But as a compact, capable everyday flashlight that can handle routine tasks and unexpected situations, it’s an impressive piece of equipment.
My biggest criticism remains the missing red-light mode. Include that in a future version, and Olight would come very close to producing my ideal EDC flashlight.
Bottom line: The Olight ArkPro Ultra is a thoughtfully designed, remarkably versatile flashlight that deserves serious consideration if you’re looking for a premium everyday carry lighting solution.
Interested in the Olight ArkPro Ultra?
About the author: David Lottmann has worked as a professional mountain guide since 2004 and is an active volunteer on multiple New Hampshire search-and-rescue teams. His experience includes technical climbing instruction, mountaineering, avalanche education, and wilderness search-and-rescue operations.