Wurkkos TS28 Blue Flashlight Review

The Wurkkos TS28 blue flashlight runs a single 21700 cell (included) and has a Luminus SFT70 emitter. Great throw and output, and a ramping option! Read on!

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Official Specs and Features

Here’s a link to the Wurkkos TS28 blue flashlight product page.

Versions

Four versions of the Wurkkos TS28 flashlight exist, but not all are available. Two are black, one is this blue color, and the other is MAO white.

Price

The Wurkkos TS28 blue flashlight costs $34.99. The price can vary a bit, so check out the product page! Here’s a referral link to Amazon, which does offer a coupon, but I am not sure this is the best price overall.

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What’s Included

• Wurkkos TS28 blue flashlight
• Wurkkos 5000mAh 21700
• Charging cable
• Lanyard
• Spare O-rings (2)
• Manual

Package and Manual

Build Quality and Disassembly

The Wurkkos TS28 blue flashlight has nice build quality, especially considering it costs just $33 and includes the 5000mAh 21700. This light is just like the previous TS28, except for the emitter – this is an SFT70.2 (the previous was SFT70). Otherwise, the build quality and such are the same!

Both the head and tail can be removed from the cell tube. Both head and tail have a beefy spring.

The cell tube is not reversible!

Size and Comps

129mm x 36mm and 112g

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

Wurkkos includes a pocket clip. It can attach only to the tail end and is a one-way clip. So the Wurkkos TS28 blue flashlight is bezel-down carry only!

A lanyard is included, and it attaches through a hole in the tailcap. It can also technically be attached to the pocket clip, but that’s much less secure.

The tailcap also has a magnet, which is strong enough to hold the Wurkkos TS28 blue flashlight easily.

Above, you may note a new holder for my magnetic-tailcap items. That’s the Exceed Designs Hyzer Titanium Mini Hatchet D2 axe. The handle (as the name suggests) is titanium. But the blade is D2 steel and perfect for retaining magnetic tailcap flashlights! The Hyzer is available in a bunch of cerakote body colors as well as different-thickness D2 heads.

Power and Runtime

The Wurkkos TS28 blue flashlight runs on one 21700 cell. The required flat-top 5000mAh cell is included.

The cell goes into the light in the usual way – positive end toward the head.

Below are a few runtime tests. The light does have low voltage protection, which kicks in around 2.9V. These are tests for the stepped modes, but the Wurkkos TS28 blue flashlight does offer a ramping mode group, too.

The switch also gives an indication when the voltage gets low.

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

Charging is built in. There’s a USB-C port in the head. This port has a press-in cover. I don’t love this cover, but it does seem secure.

A USB-C to USB-C charging cable is included, too.

Below you can see a C to C and A to C charging test. Both are fine, with charging at around 2.5A (or 0.5C), which is just fine for this 5000mAh 21700.

Modes and Currents

Mode	Mode Claimed Output (lm)	Claimed Runtime	Measured Lumens	Tailcap Amps
Turbo	3200-950-400-250	1m+1.92h+0.58h+0.33h	2981 (0s) 2564 (30s)	4.32
High	950-400-250​	1.48h+1.42h+1.58h	887 (0s) 882 (30s)	2.10
Medium	250	13.75h	231	0.37
Low	45	72h	43	72.4mA
Moonlight	3	330h	3.2	10.2mA

Pulse Width Modulation

The product page for this Wurkkos TS28 blue flashlight promotes “Constant Current Drive (Not PWM) and I find that to be the case. This is great!

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

The Wurkkos TS28 blue flashlight is controlled by a single indicating e-switch.

This switch isn’t just the standard “indicating circle” – it’s actually the Wurkkos logo that lets the indicator colors show through.

Here’s a user interface table!

State	Action	Result
Off	Click	On (Memory)
On (Except Turbo)	Click	Off
On	Hold	Mode advance (L>M>H)
Off	Hold	Moonlight^
Any	Double click	Turbo
Turbo	Click	Return to the previous mode
Turbo	Double click	Moonlight
Any	Click 3x	Strobe
Strobe	Click	Return to the previous mode
Strobe	Click 3x	Strobe advance (SOS> Beacon> Strobe)
On	Click 4x	Iterate between stepped and ramping
Off	Click 4x	Lockout
Lockout	Hold	Momentary moonlight
Lockout	Click 2x or 3x or 4x	Unlock to Low
Off (Ramping Group)	Click	On (Memory)
Off (Ramping Group)	Hold	Eco
On	Hold	Ramp (increasing). Release and hold again for ramp (decreasing).
On	Click	Off

^This is just a tiny note about how moonlight works from off. It’s unusual – there’s practically no delay between beginning to hold the switch and moonlight coming on. This is not a problem! Just an interesting difference from many lights.

LED and Beam

The Wurkkos TS28 blue flashlight uses a Luminus SFT70.2 emitter. Wurkkos says it’s the 6000K-6500K version. The reflector is smooth, deep, and the right width to make a great beam profile.

LED Color Report (CRI and CCT)

The Wurkkos TS28 blue flashlight starts cool white, and as it’s driven harder on higher modes, it gets cooler and cooler. CRI is low on all modes.

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 Wurkkos TS28 blue flashlight is a nice, low-cost light that offers flat regulation after a significant step-down. That step-down is only on Turbo, though, and the modes lower than Turbo offer at least a reasonable duration of steady output. The user interface is consistent with other similar Wurkkos lights. And that’s good, since the user interface is reasonable.

The Big Table

Wurkkos TS28 Blue Flashlight
Emitter:	Luminus SFT70.2
Price in USD at publication time:	$34.99
Cell:	1×21700
Runtime Graphs
LVP?	Yes
Switch Type:	E-Switch
Quiescent Current (mA):	0.2
On-Board Charging?	Yes
Charge Port Type:	USB-C
Charge Graph
Power off Charge Port	with cell: all modes without cell and/or tailcap: all but highest modes
Claimed Lumens (lm)	3200
Measured Lumens (at 30s)	2564 (80.1% of claim)^
Candela per Lumen	29.3
Claimed Throw (m)	506
Candela (Calculated) in cd (at 30s)	1869lux @ 6.269m = 73452cd
Throw (Calculated) (m)	542.0 (107.1% of claim)^
Claimed CCT	6000-6500K
Measured CCT Range (K)	6100-7400 Kelvin
Item provided for review by:	Wurkkos
All my Wurkkos 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
• Great beam profile
• Very throwy
• Complete package
• Uses a standard cell

What I don’t like

• Low CRI
• Very high CCT on higher modes
• Big step-down in Turbo

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Notes

• This content originally appeared at zeroair.org. Please visit there for the best experience!
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