Wuben T4

1lumen selects and reviews products personally. We may earn affiliate commissions through our links, which help support our testing.

Wuben T4 review

Wuben T4 specifications

Brand & ModelWuben T4
Flashlight categoryEDC / Tactical flashlight
LEDOsram KW CSLPM1.TG
Max. output850 Lumens
Max. beam distance401 meters
Max. beam intensity40,200 cd
Battery config.1*18350 or 1*CR123A
Onboard chargingUSB C
Main modes3
BlinkiesStrobe
WaterproofIP68
Review publication dateMay 2024

Review intro:

I love it when manufacturers put their engineering and design heads together, flex their creative muscles, and crank out new gear, and that’s what’s on deck for today. This one comes from Wuben, and they’re a regular here at 1Lumen. Over the years they’ve introduced some pretty innovative and exciting flashlights like the palm-size fan cooled X1 and the A1, the only practical 4x SBT90.2 searchlight on the market (still waiting for a competitor for that one…hint, hint Acebeam).

I still use the D1, and it’s been covered in oil, dropped, banged around, and still chugging along nicely. Anyway, tactical-use or duty-ready flashlights are a red hot market that’s become ridiculously crowded of late. While there’s a ton of 18650 and 21700 size tac or duty lights to choose from, save for a few (like the Olight Warrior Nano), there aren’t many compact tactical or duty-ready lights to choose from…until now. Introducing the Wuben T4. This is an 18350 size compact EDC that, with the help of a really cool feature set, helps segue it into the duty or tactical-use category. On with the review!

What’s in the package

The T4, when I received it, came as a pre production piece in a plain cardboard box with the flashlight and lone accessory wrapped in bubble wrap. This won’t be what you get when you purchase the production T4.

  • Wuben T4 flashlight
  • Wuben ABJ1100C 1100 mAh 18350 button top battery (loaded in the light)
  • Grip ring

This is a pre-production piece, so it’s missing the production light’s package, documentation, USB cable, lanyard, and two spare o-rings. The grip ring is optional, but Wuben is including it for cheap (about $10) when the light launches. The battery had an isolator and was sitting at 3.71 volts, and offered nearly full output out of the box, but you’ll want to charge it before use to get the most chooch out of it.

Flashlight in use, Build Quality, and Warranty

The Wuben T4 is designed as an EDC-size, duty-ready or tactical-use light, nudging into the wheelhouse of the NEXTORCH TA20. It’s compact and built around an 18350 battery, so it’s pretty small and easily fits in the palm of my hand. It’s lightweight and easy to tote around also, so EDC wouldn’t be an issue. The tube has grooves in the right places for grip, and the charge port shroud also has grippy elements.

The pocket clip is removable and you could reverse it, but it would only be good for clipping to a cap bill since the open end has a somewhat large gap. The clip came off easily, but is very secure when clipped in place. The clip itself looks awesome, with a really cool PVD gradient blue, glossy finish. It is a bit out of place here though and might seem to clash with the tacti-cool theme for some. The included grip ring slips over the back of the tube and is secured by the tailcap. It’s made from what looks like glass-fiber reinforced nylon, and features 2 relief grooves for the pocket clip heel to fit into, so you can keep the clip on with the ring in place. Nice.

The top of the ring has a carbide glass breaker tip mounted to a steel base. This is for either pain compliance in a self-defense situation or breaking glass in an emergency situation, so it’s a nice feature for a tactical-ready or duty-use light. Handling? It’s great in all grip positions. The size makes maneuvering easy and it points naturally. With the ring (aside from the self-defense and rescue benefit) you have more control for one-handed use when using the light with a handgun. 

For switching, the T4 has a single rear mechanical clicky switch. Wuben says it’s a reverse clicky, but it behaves like a reverse and forward switch. More on this in the UI section. The switch is a good one with a really proud boot and nice click action. Use with gloved hands would be easy. The tailcap has a built-in rotary selector for lighting mode changes as well: Pull up on the tailcap and it unlocks to rotate up to 70 degrees left or right to select the 3 lighting modes. The selector will seat and lock into a detent on the mode to prevent shifting.

My sample seemed worn out though, and sometimes the ring wouldn’t fully seat and rotate on its own. I’m sure production lights won’t have this issue. The T4 sports onboard charging, and the charge port is fully protected by a shroud that unscrews to expose the port like on the Fenix TK20R V2 and Olight Warrior X4. This is far superior to a rubber press-in cover or magnetic changing, so I’m really glad to see it here and it only augments durability and ingress protection. A rubber cover can tear off, dislodge, open accidentally, or wear out. The cover isn’t captured once fully unscrewed, so it flops around. Tail stands are a no-go.

Build quality for all my Wuben lights is top-notch in fit and finish and the T4 is more of the same, but it seems a little better put together and refined than some lower-end Wuben lights I have. Pricing hasn’t been officially announced, but I expect the T4 to retail for around $60. There’s no major quality control quirks to report. All the parts line up just fine, and even the charge port’s text lines up with the ‘Wuben T4’ on the bezel.

The bezel is the exception, as it has some somewhat abrupt edges, but the rest of the edges are melted and smooth. You have two color choices for the anodizing: Black and OD green (OD= olive drab). The finish is advertised as ‘military grade’ so who knows what it really is. It’s probably some kind of type III HA and it’s nicely done. The finish is less glossy and more matte, and more importantly, the finish is really durable and removing and replacing the pocket clip multiple times didn’t even phase it!

The light is milled from two aluminum alloys, depending on the color: The black color is the typical 6061 alloy, but the OD green model is milled from the superior 7075 aluminum alloy. This alloy is more durable and tougher (stronger), so it can take more abuse, and you need less aluminum for the same strength, which reduces weight. Since this is a pre-production light, there are some finishing anomalies present. The text/engraving for the tailcap selector seems a bit worn and not very legible unless the light hits it just right. Also, the tailcap selector labels are wrong: The ‘Lock’ position is the ‘TAC’ mode, and the ‘TAC’ mode is actually the Lock function. There’s also some tooling/mold marks on the plastic isolators for the back of the driver and the tailcap PCB, but hey, out of sight, out of mind right?

There’s a single spring at the tailcap and a solid contact for the driver. I think Wuben needs to address this and add a spring for the driver as it aids durability and reliability. The threads for the tailcap and the charge cover are rectangular and fully anodized with plenty of lube. They were very smooth and sealed with o-rings: two for the charge port (top and bottom), one single for the tailcap. The light is probably glued up besides, and Wuben gives the T4 an IP68 rating, one of the best! 

For the warranty, Wuben’s is a good one! From Wubenlight.com: 15-Day Replacement: Commencing from the date of purchase, should the product encounter any quality issues within the initial 15 days, you are entitled to opt for a replacement of the identical model. 1-Year Warranty: WUBEN provides a 1-year warranty specifically for rechargeable batteries; however, other accompanying accessories are not covered under this warranty. 5-Year Warranty (For Registered Users): Initiated from the date of purchase, users who have registered their product on the official WUBEN website are entitled to free repair services for any quality issues arising within five years (excluding accessories/batteries). Lifetime Maintenance: Effective from the date of purchase, should any issues arise after the initial 5-year period, WUBEN extends paid repair services exclusively to registered customers.

LED, Lens, Bezel, Beam, and Reflector

Wuben doesn’t provide the LED particulars, other than that it’s an ‘Osram.’ Peeking down the reflector gives it away instantly though and the LED is most definitely the KW CSLPM1.TG, aka. the W2. This is the 2mm2 version of Osram’s Ostar Projection LED series which also includes the CSLNM1, the 1mm2 version. These are domeless 3030 footprint LEDs running on 3 volts and are known for having low vF and very high intensity. The W2 has been in a ton of flashlights over the years and it’s a very versatile LED for pocket lights since it can be driven harder than the W1 and has about 50% more brightness (but less intensity). I think it’s an acceptable choice for the T4, but in 2024, it should be replaced with the far superior Luminus SFT-40-W.

Wuben, if you’re reading this, please swap in the SFT-40-W. The CCT is cool white around 6500K, which is fine for this application. Wuben gave the T4 a smooth reflector, and I measured it at 23 mm wide. The lens is a hardened glass, and it has a light AR coating. The bezel is a large one, and it has pronounced tips on each corner that protects the lens. There’s a nice blue anodized trim piece between the reflector and bezel that looks very nice (if a bit out of place). The beam is a nicely balanced mix of throw and side illumination. You get a focused hotspot with a bright corona and lots of spill. The beam is great, clean, and has plenty of beam distance for being so small.

Spectral measurements: 

I used the Opple Lightmaster Pro to measure the flashlight at 1 meter from the sensor. 

Mode:CCT:CRI Ra:duv
High5778 K64.60.0053

Dimensions and its competition

Dimensions: 

Wuben T4MillimetersInches
Length983.8
Head diameter341.3
Body diameter251

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

Weight

Wuben T4Weight in gramsWeight in oz
Without battery no grip ring812.8
Without battery+grip ring903.2
With Wuben 183501053.7
With battery+grip ring1154.1

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

Flashlight size comparison with its competition:

Group 1 left to right: Manker MC13 II, Manker E14 IV, Wuben T4, Amytek Prime C1 Pro USB Magnet

Group 2 left to right: Loop Gear SK01s LED, Wuben T4

Group 3 left to right EDC flashlights: Sofirn SP10 v3, Sofirn S31T, Olight Warrior Nano, Wuben T4

Wuben T4: User Interface and Driver

The driver isn’t mentioned, but I’m going out on a limb to say it’s probably a buck driver. The runtimes will tell of course. For the UI, Wuben pulled the simple card and that’s a good thing since they’re marketing it as a tactical-use light. Even without a manual, the UI was super intuitive and easy to learn and use. You get two lighting modes, TAC and Duty, which are selected with the rotary selector on the tailcap. Tac has two modes, and Duty has 3 modes. These are controlled by a single switch in a pretty clever way, although it’s not without a quirk. 

Available modes: 

  • Low, Medium, High

Available blinky modes:

  • Variable Strobe

From OFF Duty Mode:

  • Tap switch: Momentary on in High
  • Fully click switch: Constant on in High

From ON Duty Mode:

  • Fully click the switch: Turns off
  • Tap switch: Changes modes (High-Medium-Low-High

From OFF TAC Mode:

  • Tap switch: Momentary on in High
  • Fully click switch: Constant on in Strobe

From ON TAC Mode:

  • Fully click the switch: Turns off
  • Tap switch: Switches back to High

Mode memory:

  • None

Shortcuts:

  • None

Low voltage warning/protection:

  • ?

Strobe/blinkies

  • Strobe

Lock-out mode: 

  • Yes. Turn the mode selector to the Lock position to lock out the light. The tailcap can also be turned ⅛ turn counterclockwise to mechanically lock out

PWM

  • None visible

Additional/summary info on the UI: 

  • As far as tactical/duty-use lights go, the Wuben T4 has a well-sorted UI. It’s simple, easy to use, easy to learn, and for the tactical-use space, it does everything right. However, that presents some quirks for everyday, casual users who aren’t serving warrants, rescuing shoppers lost in the WalMart parking lot, or on traffic duty. The main issue was the fact that it always starts in High mode. This is regardless of whether it’s in TAC or Duty mode. This could be annoying when you don’t want or need full brightness. Also, in Duty mode, the first click locks in High mode, and tapping the switch cycles through the Medium and Low modes and then back to High. Clicking the switch off will momentarily reactivate High mode, so be prepared if you’re using the Low mode in the middle of the night (your eyes won’t like it, trust me). The mode spacing is also good, but I would like to see a lower Moon or Eco mode added for the Duty lighting mode.

Wuben T4 Charging and batteries

The Wuben T4 is built around the 18350 li-ion cell, but it will also take a CR123A lithium primary cell (3 volts) in a pinch. The 18350 is still relevant and is ideal for subcompact flashlights since it’s small, lightweight, and advances in battery tech have allowed higher current handling and capacities. The T4 comes with Wuben’s own ABJ1100C 18350. It’s a protected button top with 1100 mAh capacity (fairly standard). I tried some other batteries and they worked, but unprotected flat top 18350s were too short and I don’t know what CR123As Wuben tested, but my Energizers were like a hotdog down a hallway and didn’t fit.

The T4 features onboard USB C charging, and the charge port is protected by the aforementioned shroud which unscrews to expose the port. It takes a good amount of effort to unseat the cover, which can be good or bad, but for me it was annoying since there’s not a whole lot for my sausage fingers to grip on to. With the 18350, I was seeing around 1 amp at 5 volts for charging, which is fairly standard and safe for the battery on my Ruideng AT35 USB A tester (C to C also works-same output). The battery after a runtime took 2 hours 22 minutes to fully charge and added 1286 mAh, which seems a bit optimistic.

Charge typeFitsNo fitCharge time
Onboard USB CStandard and protected button top 18350Flat top unprotected 18350 and CR123A2 hours 22 minutes to add 1286 mAh

Performance test

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.

Lumens are measured in my 50 cm integrating sphere with a Digi-Sense 20250-00 data logging luxmeter. The sphere has been calibrated with a Convoy S2+ measured to 260 Lumens and the figures are within 10% of actual. Current was measured with my Fy219 clamp meter. Testing was done with the included Wuben ABJ1100C 1100 mAh battery, which was fully charged before the testing.

ModeAmps at startSpecifiedTurn on30 sec.10 min.
LowN/A5 lm4.924.92
MediumN/A150 lm146144139
High6.8 A850 lm603418258

Ambient temperature during testing:

  • 19.5 °C 

Parasitic drain:

  • N/A (it’s a clicky switch)

Interestingly, the output for Medium looks good, along with Low, but the High mode…not so much. I measured the High output a couple of times with a fresh battery, and even in another calibrated integrating sphere and the difference was negligible. Maybe my sample was underperforming?

Wuben T4 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.

Lumens are measured in my 50 cm integrating sphere with a Digi-Sense 20250-00 data logging luxmeter. The sphere has been calibrated with a Convoy S2+ measured to 260 Lumens and the figures are within 10% of actual. I use a Digi-Sense 20250-92 data logging thermocouple for the temperature measurements. The probe is affixed to the head using kapton tape and uses the same 5 second sampling rate for logging. I tested Medium and High modes using the Wuben ABJ1100C battery which was fully charged before each test.

ModeSpecifiedRuntime (ANSI FL1)Time till shut off
Medium2h 30min2h 43min2h 43min
High1h 1min1h 13min1h 13min

The runtimes look just fine, and Wuben got creative with the High mode step down algorithms. After a steep drop 60 seconds after turn on, the output steps down in roughly 5 minute increments until an abrupt shut down a bit over 1 hour in.

The output appears to be regulated, and it is for the most part despite the steps. However, your eye won’t notice it unless you’re paying close attention (or staring at a recording instrument). Medium mode does have fully regulated output, however, and it’s a nice, flat output for the entirety of the 2 hour 43 minute runtime until an abrupt shut down.

There’s no LVP warnings prior to the shutdown that I could see. Temperatures were kept in check and I didn’t notice any thermal regulation per-se, and the light was never hotter than 55 C at the head, and totally hand-friendly for the duration of the High runtime. This is a small host so the step downs are necessary. The High mode can be activated after the step down again and again, but the host will get quite hot eventually. The LVP works fine, and the cell was discharged consistently to 2.9 volts.

Runtime comparison

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.

Beam distances are measured using a Uni-T UT383S luxmeter measured indoors at 5 meters using a fully charged Wuben ABJ1100C battery. Measurements taken at 30 seconds. The light allowed to cool between the Medium and High measurements.

ModeSpecifiedCandela measured MetersYards
Low?40040 m44
Medium?8250182 m199
High40,200 cd28,475 cd337 m368 yd
High at start?39,725 cd399 m436

Ambient temperature:

  •  19.8 °C

Beamshots

Camera settings and distance: Photos taken with a Canon EOS R100 with Canon RF-S 18-45 mm STM lens. For the 45 meter and 95 meter shots, the camera is set to 0.3s, F5 ISO1600 and 5000K WB. 

Beamshots of the following flashlights compared:

  • Wuben T4
  • Loop Gear SK01s
  • Acebeam P15 Defender
  • Fenix PD35 V3
  • Armytek Prime C1 Pro Magnet USB
  • Manker MC13 II SFT-40-W

Please note that the following 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 in different seasons or weather conditions, and therefore 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 Wuben. We have not been paid to review, nor have we been holding back on problems or defects.

Final Verdict

Pros

  1. Rotary switch for lighting mode changes
  2. Great build quality
  3. Simple duty-ready UI
  4. Onboard charging with fully protected charge port
  5. Regulated output
  6. Great beam distance

Cons

  1. Down on output for High mode
  2. Regular modes for the Duty Mode are accessed by clicking through High mode
  3. Charge cover was a bit difficult to unscrew at times

Explanation on star ratings:

1: Avoid: a match would be a better choice – 2: Poor: significant defect or issues; almost unusable – 3: Average: some defects or issues; but still usable 4: Good: recommended (minor issues) – 5: Great: highly recommended

Reviewer Nick
Nick

4 stars: ★★★★

While our star rating provides a reliable indicator, we encourage you to read the full review to make an informed decision based on your own needs and preferences.

It’s no joke that the tactical and duty-use light scene is mighty crowded, with manufacturers scrapping it out to squeeze a new product in. The Wuben T4, hi fits into that niche nicely, with the slick design and innovative rotary selector for switching lighting modes like the NEXTORCH TA20 and Fenix TK20R UE.

Rotary selectors aren’t new, but it’s nice to see it implemented here on a small, 18350 form factor flashlight. Speaking of form factor, the T4 is a nice handling, compact light. It’s maneuverable, easy to pocket, and can be clipped anywhere. The grip ring adds a nice measure of control also and melds well with a handgun when you don’t have a pistol mounted light. The breaking tip is also a nice feature. The light will be durable as well thanks to the uplevel aluminum alloy on the OD green version, and the fully protected charge port.

The T4 gives decent output as well, and while my sample was down on output for High mode, it’s still sufficiently bright for EDC use, and the beam distance is great for a small light!

Misses? My light was a pre-production sample, so it had some finish blemishes and an issue with the mode selector ring, but otherwise the only fault is the High mode being down on output and the annoyance with the Duty Mode mode switching. Not a huge deal, but worth mentioning was the charge port’s reluctance to unscrew at times. Also, there’s really no reason for a compact throwy light not to have the Luminus SFT-40-W…just saying.

Otherwise, this is a solid little EDC flashlight or backup duty light. I wouldn’t use it as a primary duty light though because you need at least 2000-2500 Lumens and a large capacity battery to be viable for that role. Should you pick one up? If you need a slick EDC light with great throw, regulated output, a simple UI and solid build quality, give the T4 a look. I’m giving it 4 stars.

Buy your Wuben T4 with a discount

If you buy directly from Wuben, make sure you use our exclusive discount code. Add coupon code 1Lumen20 at checkout to get 20% off.

1lumen selects and reviews products personally. We may earn affiliate commissions through our links, which help support our testing.