The NIWALKER BKL N50S was sent to me directly by Flashlightgo for review.
For technical details and to purchase the flashlight:
https://flashlightgo.com/products/niwal … flashlight
Niwalker is a leading manufacturer of professional portable LED lighting tools—ideal for outdoor activities such as camping, hunting, diving, and cycling—that has been operating in the industry since 2005, offering original, innovative products at competitive prices. The new Niwalker N50S is a compact, high-performance EDC flashlight that supports dual power options (18350 and 18650 batteries). Well-crafted, it delivers a 1750-lumen output (1800 lumens with the 18650 battery) and a focused, cool-white beam capable of reaching a theoretical distance of 965 meters. The N50S features a USB-C charging port and a magnetic tail cap. It also includes an electronic lockout function to prevent accidental activation. The Niwalker N50S is available in two colors: Green and Blue (the latter being the version reviewed here).
The Flashlightgo team consists of outdoor enthusiasts offering a curated selection of the world’s best flashlights—including tactical lights, lanterns, camping lights, bike lights, work and safety lights, and EDC flashlights—as well as batteries, tablet accessories, and other outdoor gear, all with 48-hour shipping.
The Niwalker N50S features 6 light levels, in addition to a Strobe mode, and is IP65 certified for dust and water protection.
The Niwalker N50S arrives in a light-colored box. Inside the package, we find: the Niwalker N50S, an extension tube for 18650 batteries, a USB-C charging cable, an 18350 battery, an 18650 battery, a lanyard, spare O-rings, and a manual.
The Niwalker N50S features an aluminum alloy body and a durable stainless steel bezel on the head, equipped with three silicon nitride ceramic inserts that allow for easy glass-breaking in an emergency. It is composed of three sections, providing access to both the head and the tail; the head houses a plated contact button, while the tail contains a plated spring for battery contact.
I found the anodizing to be light, with some parts starting to lose their beautiful blue color after prolonged use.
The N50S fits comfortably in the hand and is compact, measuring just 99 mm in length and weighing only 128 g (including the 18350 battery). Its small size makes it easy to carry in a pocket, case, or backpack.
A key feature of the package is the extension tube; when used with the included 18650 battery, it boosts the flashlight’s runtime and beam throw. Even with the 18650 battery, the N50S remains compact and well-balanced in the hand, with a body length of 132 mm and a weight of approximately 180 g (battery included).
The tail cap features a built-in magnet that allows the flashlight to be attached to metal surfaces for hands-free use.
The Niwalker features a USB-C charging port located opposite the electronic switch. The port is protected by a thick rubber cover that, once fully seated, is difficult to open quickly.
Charging takes place at a maximum current of 1A, regardless of whether the 18350 or 18650 battery is used.
Charging the 18350 battery took 1 hour and 40 minutes, while charging the 18650 battery took 4 hours and 10 minutes. During charging, the status LED flashes red, turning solid blue when charging is complete.
To turn the device on and cycle through the available levels, there is an electronic switch featuring a central notification LED. This LED remains constantly lit, with its color indicating the remaining battery level. The button is easy to locate even in the dark and produces a barely audible click.
A red light indicates a battery level below 30%, while a flashing red light indicates a level below 10%.
The optical assembly features a reasonably deep smooth reflector with a high-performance, circular, domeless LED at its center—a model not specified by the manufacturer (possibly a Fireflies FFL505UT?). With this configuration, the Niwalker N50S’s focused beam achieves impressive distances relative to its size.
It is possible to unscrew the steel ring and remove the glass to access the LED.
Niwalker N50S next to other flashlights.
User Interface:
The Niwalker N50S features a simple user interface. The flashlight offers 6 brightness levels in addition to a special Strobe mode.
To access the 10-lumen Moonlight Mode, press and hold the power button. This level is separate from the others; to access the other levels, you must turn the N50S off and then back on.
To cycle through the preset brightness levels—Low (65 lm), Mid2 (175 lm), Mid1 (450 lm), and High (700 lm)—simply press the electronic switch while the flashlight is on.
Turbo Mode: Double-click for maximum output.
Strobe Mode: Triple-click (works whether the light is on or off).
Battery Voltage Check: Quickly check the battery voltage with four clicks.
Lockout Function: Five rapid clicks to prevent accidental activation during transport.
Beam and Runtime:
The Niwalker N50S produces a concentrated light beam with a bright hotspot and uniform spill, except at the sides, where the pattern of the protective bezel is visible.
The Niwalker N50S features a powerful beam suitable for illuminating medium to long distances, though in my tests, it falls short of the manufacturer’s specifications. The peak beam intensity (measured as candela/lux at 1 meter using an LX1330B light meter)—recorded at the highest setting (Turbo 1800lm) from a distance of 5 meters—is lower than claimed, coming in at 138,600 cd with a throw of approximately 755 meters. Nevertheless, this figure remains impressive given the product’s size.
Calculating Duv from CIE 1931 xy coordinates
Using the OPPLE Light Master Pro—an affordable and reasonably accurate (though uncalibrated) device—I took measurements of the CCT (correlated color temperature) and Ra (color rendering index) for the LED output. Flicker levels fall within the safe “green” range. My tests showed that the beam’s color rendering index is average—not particularly high—at around 70. The Duv value indicates a slight shift in the beam’s color toward green/yellow.
Note: The Duv of a color point within a chromaticity coordinate system describes its distance from the black-body locus. Duv can be approximated using only a pair of CIE 1931 xy coordinates (source: www.waveformlighting.com).
In TURBO mode (1750 lumens), I measured a CCT of 6515 and an Ra of 70.5 (Duv 0.0042).
In MEDIUM mode (700 lumens), I measured a CCT of 6207 and an Ra of 68.2.
Using a FLIR thermal camera, I measured the heat distribution on the Niwalker N50S in Turbo mode (1,750 lumens) at 1, 2, and 5 minutes after activation (with a fully charged battery). In Turbo mode, the Niwalker N50S heats up rapidly, reaching high temperatures. After two minutes, it is difficult to hold the flashlight without burning yourself.
Runtime tests were conducted using the Turbo and High modes for both battery types (18350 and 18650).
I would like to point out that the values shown in the graphs should be viewed primarily as a reference, as the tests were performed using hobbyist-grade equipment and under environmental conditions that differ from those used in a laboratory setting.
The unregulated discharge time is respectable, aligning closely with the figures stated by the manufacturer.
The first 10 minutes:
VIDEO Unboxing and Use
CONCLUSIONS
In recent weeks, Niwalker has introduced a new high-performance, compact EDC flashlight: the N50S. It features dual power options (supporting both 18350 and 18650 batteries). The package includes an extension tube to accommodate the included 18650 battery.
The Niwalker offers excellent throw, although the beam doesn’t quite reach the distance claimed by the manufacturer. It boasts a great design and a convenient tail magnet. However, it lacks an anti-roll clip, and charging is somewhat slow—particularly when using the 3500mAh 18650 battery.
The price point is accessible for a compact, throw-oriented EDC light.
Thanks for reading the review.
Roberto
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