Wuben E2 Pulse Keychain Flashlight Review

The Wuben E2 Pulse keychain flashlight has one front white LED with three modes and multiple side LED options, including a 2-mode high CRI warm white lantern.

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Official Specs and Features

Here’s a referral link to the official product page.

Versions

There’s just one version of the Wuben E2 Pulse keychain flashlight, but it’s available in red (as shown here) and black.

Price

The Wuben E2 Pulse keychain flashlight lists for $29.99 but is on an introductory sale at $19.99.

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What’s Included

• Wuben E2 Pulse keychain flashlight
• Carry chain
• Charging cable
• Split ring
• Manuals

Package and Manual

Build Quality and Disassembly

The Wuben E2 Pulse keychain flashlight can not be disassembled. The build quality is fine.

My package included this challenge coin. I don’t know if it’s standard (it probably is).

Size and Comps

19mm x 14.6mm x 41.4mm and 10.7g

Here’s the light in hand:

Here’s the test light with the venerable Convoy S2+. This is a brass version, which is a good bit heavier than aluminum, but has the same dimensions: 24mm in diameter by 117.5mm in length.

Also in the photo above, my Standard Reference Material (SRM) flashlight is the Hanko Machine Works Trident, an 18350 light. While I have not reviewed or tested the Gunner Grip version seen here, I have tested a Hanko Machine Works Trident Total Tesseract in brass. I love the Trident, and it’s a striking contrast to the inexpensive Convoy S2+, another great SRM.

Retention and Carry

The tail has a magnet built in.

The chain has an attachment that clips into the tail of the Wuben E2 Pulse keychain flashlight. It’s a very secure connection.

These little swivel pieces grab on to the light.

A split ring is included, too.

Power and Runtime

The Wuben E2 Pulse keychain flashlight has a built-in, inaccessible 120mAh LiPO battery. Below are a number of runtime tests – all the front output levels as well as the highest side white level.

The temperature lines in these charts are included as general context, not precise measurements. The values represent the range (min to max) during testing, but should not be taken as exact readings. A temperature sensor is not always attached to the bezel (or even the hottest spot, assuming that could be defined). Even with ideal placement, too many variables affect temperature to definitively state a specific max value.

Charging

The Wuben E2 Pulse keychain flashlight features USB-C charging and includes a USB to USB-C charging cable.

I found this charging port cover to be very fiddly, and get in the way of the charging connector. But it does work just fine.

Pulse Width Modulation

There’s a whole bunch of PWM! All three front modes have it, and both side white modes have it. It’s likely to be noticeable if you’re sensitive to PWM.

Click here to see a “baseline” – a chart with almost no light hitting the sensor.

Then there’s the Ultrafire WF-602C flashlight, which has some of the worst PWM I’ve seen. It’s so bad that I used a post about it to explain PWM! Here are multiple timescales (10ms, 5ms, 2ms, 1ms, 0.5ms, 0.2ms) to make comparing this “worst” PWM light to the test light easier. That post also explains why I didn’t test the WF-602C at the usual 50us scale.

User Interface and Operation

One switch controls the Wuben E2 Pulse keychain flashlight. It’s a metal-covered e-switch.

Here’s a user interface table!

State	Action	Result
Off	Click	On
On	Click	Off
On	Double click	Cycle through modes: Main light > Side white light > Side red & blue light
On	Hold	Advance through brightness levels for active mode

LED and Beam

Wuben doesn’t state what any of the emitters are. The front emitter has a very small reflector.

LED Color Report (CRI and CCT)

The front emitter is high CCT and low CRI. However, the side white emitters are pleasantly warm and high CRI! That can be seen in the fourth and fifth photos.

CCT (Correlated Color Temperature) refers to the measurement of the color appearance of light, expressed in Kelvins (K), which indicates whether the light is warm (yellowish) or cool (bluish). A lower CCT (below 3000K) is considered warm light, while a higher CCT (above 5000K) gives cooler, bluish light.

CRI (Color Rendering Index) is a measure of how accurately a light source renders colors in comparison to natural sunlight. Scored on a scale from 0 to 100, higher CRI values indicate that colors appear more true to life and vibrant, similar to how they would look under the sun.

Beamshots

These beamshots always have the following settings:  f8, ISO100, 0.3s shutter, and manual 5000K exposure. These photos are taken at floor level, and the beam hits the ceiling around 9 feet away.

Tint vs BLF-348 (KillzoneFlashlights.com 219b version) (affiliate link)

I keep the test flashlight on the left and the BLF-348 reference flashlight on the right. These photos are taken around 18 inches from the door.

I compare everything to the KillzoneFlashlights.com 219b BLF-348 because it’s inexpensive and has the best tint!

Summary and Conclusion

The Wuben E2 Pulse keychain flashlight is a tiny keychain light. It’s a lot like some of the RovyVon keychain lights, just a different shape. The battery can’t be accessed (or changed). The side modes being warm(ish) and high CRI is fantastic, and I wish the front emitter was similarly high CRI (and at least a bit warmer). The user interface is fine, and at around $20, the Wuben E2 Pulse keychain flashlight is a fun light to grab. Oh, and the body glows!

The Big Table

Wuben E2 Pulse keychain flashlight
Emitter:	Unstated (red body)
Price in USD at publication time:	$19.99
Cell:	Internal
Runtime Graphs
LVP?	Yes
Switch Type:	E-Switch
Quiescent Current (mA):	?
On-Board Charging?	Yes
Charge Port Type:	USB-C
Charge Graph
Power off Charge Port
Claimed Lumens (lm)	150
Measured Lumens (at 30s)	84 (56% of claim)^
Claimed Throw (m)	26
Candela (Calculated) in cd (at 30s)	17lux @ 3.641m = 225cd
Throw (Calculated) (m)	30.0 (115.4% of claim)^
Claimed CCT	red body –
Measured CCT Range (K)	red body 4400-6600 Kelvin
Item provided for review by:	Wuben
All my Wuben reviews!

^ Measurement disclaimer:  Testing flashlights is my hobby. I use hobbyist-level equipment for testing, including some I made myself. Try not to get buried in the details of manufacturer specifications versus measurements recorded here; A certain amount of difference (say, 10 or 15%) is perfectly reasonable.

What I like

• Low cost
• Glow body
• High CRI side emitters
• Good attachment to necklace

What I don’t like

• Inaccessible battery
• Low CRI/High CCT front emitter

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Notes

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