Wuben E2 Pulse EDC Torch Review
Wuben E2#
- Specifications
- Introduction
- Torch in use
- Build quality
- LED, bezel, lens, reflector and beam
- Size and comparison
- User interface
- Batteries and charging
- Performance
- Beamshots
- Thermal Images
- Conclusion
- Price
- Product page
Specifications#
| Brand/model | Wuben E2 |
|---|---|
| LED | W3535 5000K Main Light, COB Side White, Red and Blue |
| Maximum lumens | 150 lm |
| Maximum beam intensity | 169 cd |
| Maximum throw | 26 m |
| Battery | 120mAh LiPo |
| Onboard charging | Yes (USB-C) |
| Material | PC, Aluminium |
| Modes | 3 |
| Blinkies | Heartbeat, Red Beacon, Red Blue Flash |
| Waterproof | IP66 |
| Review date | September 2026 |
Introduction#
The Wuben E2 is a tiny keyring torch with a main white light, a side white light, red and blue lights, and built-in USB-C charging.
What has Wuben come up with now?!
It looks similar to the design of the Wuben X3 with a semi-transparent glow-in-the-dark polycarbonate housing and a black anodised aluminium bezel.
Wuben kindly provided this torch for review. I have not been paid for this review nor have I held back my opinions of this torch.
Packaging#
The Wuben E2 comes in a white and blue Wuben branded box with an image of the torch on the front and specifications on the side.
The following is included in the box:
- Wuben E2.
- USB-A to USB-C charging cable.
- Wuben P5 quick-release connector with necklace (optional).
- Keyring.
- User manual.
User manual#
P5 Guide#
Torch in use#
The Wuben E2 is tiny! It can be attached to a keyring, attached to a backpack, mounted magnetically on a surface or attached to a necklace.
Wuben gave the E2 the nickname “Pulse” because of the heartbeat mode where it pulses like a heart.
The N52 magnet in the tail is pretty strong.
The lanyard hole it the tail allows a keyring or a lanyard to be attached.
The included keyring fits nicely in the lanyard hole.
Build quality#
The Wuben E2 has a semi-transparent glow-in-the-dark polycarbonate housing, an aluminium bezel and a steel button.
It is available with a black gradient.
And it is also available with a red gradient.
The USB-C cover is made of some kind of hard plastic. It feels durable. The port is pretty narrow. Small USB-C plugs fit but larger plugs do not.
Overall, the build quality is pretty good.
LED, bezel, lens, reflector and beam#
The Main Light has a W3535 5000K cool white LED. It looks similar to an Osram P9 3737 LED.
The Wuben E2 has a multi-step reflector with a matte finish. There is a glass lens held down by an aluminium bezel.
The Side White Light is a custom COB with 90 CRI 5000K. It helps light up the glow-in-the-dark housing.
There are also Red and Blue side lights.
Red Beacon#
Red Blue Flash#
CCT, CRI, and duv#
I have taken Correlated Colour Temperature (CCT) and Colour Rendering Index (CRI, RA of R1-R8) measurements with the torch positioned metres away from an Opple Light Master Pro III (G3). I measured the centre of the beam.
The CCT is around 5762K, the CRI is around 69 and the Delta u, v is positive (slightly green) for the Main Light.
The beam produced by the Main Light has a slightly pillow-shaped hot spot and spill. It is mostly round. The beam has a bit of throw due to the reflector.
The CCT is around 5000K, the CRI is around 96 and the Delta u, v is positive (green) for the Side White Light.
The beam produced by the Side White Light is cute. It looks like a tiny lantern with light being emitted from two sides.
| LED | Mode | CCT (K) | CRI (Ra) | x | y | Duv |
|---|---|---|---|---|---|---|
| Main | Low | 5705 | 69.2 | 0.3278 | 0.3431 | 0.0031 |
| Main | Med | 5787 | 69.5 | 0.3260 | 0.3406 | 0.0027 |
| Main | High | 5794 | 68.9 | 0.3258 | 0.3425 | 0.0038 |
| Side | Low | 5009 | 97.1 | 0.3456 | 0.3605 | 0.0042 |
| Side | High | 4973 | 96.7 | 0.3469 | 0.3642 | 0.0055 |
Calculate Duv from CIE 1931 xy coordinates
Dimensions and size comparison#
Dimensions#
I took the following measurements using a digital caliper.
| Measurement | Unit (mm) |
|---|---|
| Height | 41.57 |
| Width | 19.08 |
| Depth | 15.0 |
Weight#
I took the following measurements using a digital scale.
| Weight | Unit (g) |
|---|---|
| Torch | 11.25 |
| P5 keychain | 8.06 |
| Torch with P5 keychain | 19.31 |
Size comparison with its competition#
From left to right: Wuben E2 Black, Wuben E2 Red
From left to right: Wuben E2, Olight i1R 2, Nitecore Tini2, Manker LAD III NW
User interface#
The Wuben E2 is controlled by a switch.
The Main Light has three modes: Low, Med and High.
The Side White Light has three modes: Low, High, Heartbeat.
The Side Light also has two more blinky modes: Red Beacon, Red Blue Flash.
| State | Action | Result |
|---|---|---|
| Off | Press and hold | Battery status |
| Off | Click | On (memory) |
| On | Click | Off |
| On | Two clicks | Cycle (Main Light, Side White Light, Side Red Blue) |
| Main Light | Press and hold | Cycle (Low, Med, High) |
| Side White Light | Press and hold | Cycle (Low, High, Heartbeat) |
| Side Red Blue | Press and hold | Cycle (Red Beacon, Red Blue Flash) |
Mode memory#
There is mode memory. The last used mode is memorised.
Pulse Width Modulation#
There is PWM but I did not notice any visible PWM (flickering).
I measured the PWM of the light with a Zoyi ZT-706S oscilloscope.
Main Light (Low, Med, High)
Battery status#
Press and hold the switch to display the battery status with the red and blue side lights. The side lights will remain on for five seconds.
| Colour | Battery level |
|---|---|
| Blue | Capacity ≥ 90% |
| Blue blinking | 40% ≤ Capacity < 90% |
| Red | 15% ≥ Capacity < 40% |
| Red blinking | Capacity < 15% |
What I like about the UI#
- I like that the UI on the final version is going to be different.
What could be improved#
I would prefer a single click for on/off and hold to cycle between low and high.
Batteries and charging#
Battery#
The Wuben E2 has a built-in 120mAh LiPo battery.
Does the small size justify the built-in battery like AirPods? I think so.
But Wuben has taken some great steps forward recently with the Wuben X4, Wuben X5 and the Wuben X1 Pro where the batteries are replaceable.
It would be nice to see Wuben have replaceable batteries in future designs.
Charging#
There is built-in USB-C charging.
Power supply: PinePower Desktop USB-C
USB Meter: ChargerLAB Power-Z KM003C Amazon Australia
Room temperature: 15 C
It took 1 hour 37 minutes to fully charge the torch at a rate of 5V/0.1A.
The red and blue side lights are used as a charging status indicator. The charging status indicator is red while charging and it becomes blue when charging is complete.
Power supply compatibility#
I tried the following power supplies:
| Power supply | USB Type | Protocol | Does it charge? |
|---|---|---|---|
| PinePower Desktop | USB-C | PD | Yes |
| PinePower Desktop | USB-A | QC | Yes |
| PinePower Desktop | USB-A | Yes |
USB-C to USB-C charging works.
Performance#
Specifications from the user manual:
Main Light#
| FL1 Standard | High | Med | Low |
|---|---|---|---|
| Output (lumens) | 150 + 100 | 50 | 5 |
| Runtime | 1min + 30min | 1h | 7h |
| Beam Distance (metres) | 26 | ||
| Beam Intensity (cd) | 169 |
Side White Light#
| FL1 Standard | High | Low | Heartbeat Flash |
|---|---|---|---|
| Output (lumens) | 80 | 10 | |
| Runtime | 30min | 3h | 17h |
Side Red and Blue Light#
| FL1 Standard | Red Beacon | Red Blue Flash |
|---|---|---|
| Output (lumens) | 1 | 1 |
| Runtime | 35h | 28h |
Lumen measurements#
| LED | Mode | Specs | Lumens @turn on | Lumens @30 sec | Lumens @10 min |
|---|---|---|---|---|---|
| Main | Low | 5 | 5 | 5 | 5 |
| Main | Med | 50 | 39 | 39 | 36 |
| Main | High | 150 + 100 | 124 | 101 | 74 |
Runtime graphs#
I used my own DIY lumen tube with a TSL2591 sensor and forked bmengineer’s project RuTiTe to record runtimes.
Note: Lumen measurements may be off by 10% with my DIY lumen tube.
The room temperature was approximately 15 C.
Runtime#
Here is a summary of the runtime results:
| LED | Mode | User manual | Runtime | Turn off |
|---|---|---|---|---|
| Main | High | 1min + 30min | 34min 13s | 34min 13s |
| Main | Med | 1h | 1h 24min 40s | 1h 24min 40s |
| Main | Low | 7h | 10h 41min 49s | 10h 41min 49s |
“Runtime” is the time until the output reduces to 10% of the output at 30 seconds (as per the ANSI/PLATO FL1 2019 Standard).
“Turn off” is the time until my DIY lumen tube no longer detects more than one lumen.
“+” indicates that the light remained on after recording had stopped.
The runtime is better than expected.
It would be nice if the Wuben E2 maintained a constant output. It gradually gets less bright over time.
Throw#
I took lux measurements with a UNI-T UT383BT at 30 seconds. High was measured at one metre.
| Mode | Specs (cd) | Specs (m) | Candela measured (cd) | Distance (m) |
|---|---|---|---|---|
| Low | 9 | 6 | ||
| Med | 102 | 20 | ||
| High | 169 | 26 | 275 | 33 |
Beamshots#
I went to a local park and aimed the torch at a tree 70 metres away.
Beamshots were taken using a Sony RX100M2 using 3.2", f3.2, ISO 100, 5000K WB.
Wuben E2 Main (High)#
Wuben E2 Side (High)#
Acebeam UC3A (High)#
Manker LAD III CW (Turbo)#
Manker LAD III NW (Turbo)#
RovyVon A8 (High)#
Olight i1R 2 Pro (High)#
Thermal Images#
I used a HIKMICRO B20S thermal camera to take thermal images of the torch while using High.
Room temperature: 10 C
| Time (mm:ss) | Max Temperature |
|---|---|
| 00:00 | 13.0 C |
| 01:00 | 21.0 C |
| 02:00 | 26.9 C |
| 03:00 | 30.8 C |
| 04:00 | 34.2 C |
| 05:00 | 36.5 C |
| 06:00 | 38.3 C |
| 07:00 | 39.4 C |
| 08:00 | 40.4 C |
| 09:00 | 41.2 C |
| 10:00 | 41.5 C |
Conclusion#
The Wuben E2 is definitely worth checking out if you are looking for a tiny keyring torch.
The build quality is pretty good. The hard USB-C cover looks durable. The semi-transparent glow-in-the-dark polycarbonate housing does not get scratched easily.
The heartbeat pulse mode looks pretty cool! That is one of the standout features.
The lumen output and beam distance is ok for a torch this size. But if you want something with more lumens and more candelas then the Manker LAD III NW is another keyring torch worth checking out.
Pros:#
- Good build quality.
- Good runtime.
- Hearbeat pulse mode.
- Small size.
- Decent beam.
- USB-C charging.
- Glow-in-the-dark housing.
- Strong magnet in the tail.
- Side Light has a high CRI (90+).
Cons:#
- Main Light has a CRI of about 69.
- Output drops gradually over time.
Price#
The Wuben E2 Bundle (E2 + P5) is US$19.99 from Wuben E2 Bundle at wubenlight.com at the time of writing.
The Wuben E2 on its own is US$12.99 from amazon.com at the time of writing.
Product page#
Wuben E2 Bundle at wubenlight.com (affiliate link)
Wuben E2 at amazon.com (affiliate link)
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