Wurkkos TS21 Review (3200 Lumens, SST20 90+ CRI, 21700, USB-C)

Today I have a fun one that I think you will want to stick around and watch, with the Wurkkos TS21. This is a newish light that Wurkkos has come out with, it’s a compact design, has 3 emitters, runs off a standard 21700 battery, uses the Andruil 2 firmware, and has onboard USB-C charging. Wurkkos did send this to me to look at and review, and they have offered a 20% discount on Amazon which is in the description if you’re interested in picking one up. 


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Pickup the Wurkkos TS21 from Amazon and save with the coupons below, or from Wurkkos direct (no coupon)

Gray from Amazon https://amzn.to/3rxyEFD Use code X5KSZIQH to save 20%

Black from Amazon WARNING THIS IS RUNNING Anduril 1 Read the listing carefully https://amzn.to/3Jb3byH Use code 5SDBMRK8 to save 20%

More options from Wurkkos direct are at the end of the review.


Packaging & Accessories

Wurkkos has a pleasant but basic white box with orange ends that largely displays their name in the middle. On the side is a sticker telling you what model you have inside, body color as well as emitter choice. Inside the light was in bubble wrap and continued the 5000mAh 21700 battery, pocket clip, Lanyard, extra orings, a USB-A to C Charging cable, and literature. 


Construction & Design

The TS21 is made from aluminum and in anodized in a variety of colors. It’s currently available in Champagne (A metallic tan color), Metal Gray, Black, Red (What I have here), and a splatter camouflage. The anodizing here is god, but I have noticed my red isn’t super durable, this isn’t uncommon with aluminum anodizing because black is the most durable color available.

The tailcap is flat, and magnetic, not super strong but enough to hold the weight of the light. The lanyard hole is an eyelet and is a little sharp. The body tube is nicely scalloped and completely reversible. It has groves milled in to accept the pocket clip on either end. 

The head grows in side, and contains minimal heat syncing. The button press feels about what you would expect from an eswitch, but the button itself kind of rattles around some, not the best feeling in the world. There are LED indicators under the switch that are used to show the charge status, and act as a locator LED. They go Red, Blue, and Amber in color. At the front there is a stainless steel bezel with large but shallow crenulations, a glass lens and a triple TIR optic. Note this isn’t the standard size you have seen in other lights like the FW3A, etc, it’s slightly larger.

Thread are anodized, square cut and nicely lubricated from the factory. Internally, the front is just a button contact, out the rear there is a large gold coated spring, and the tail cap is magnetic. It’s just strong enough to hold the light on a painted metal surface with a slight amount of slippage. 



Retention options are the dual direction pocket clip, which allows you to put the light on a hat and run a makeshift headlamp, or use more traditionally as a pocket clip. It’s reasonably deep carry and will mount on the rear or front of the light. Your lanyard attachment points are either on the tailcap of the light, or on the pocket clip. As mentioned the mount on the tailcap is a little sharp and can be a hot spot for larger hands. Speaking of fit in the hands it’s pretty good, It’s a reasonably compact design and provides a modest amount of grip. 


Size & Weight

I measured the TS21 at 113.3mm (4.46”) in length, maximum diameter at the head at 28mm (1.1”) and minimum diameter on the body at 26.06mm (1.02”). Weight with the battery and clip installed came in at 158.7g or 5.10oz. The light is IPX water rated and here it is compared with a few similar style lights and the popular Wurkkos FC11. 


LED & Beam

The TS21 has 3 Luminus SST-20 Emitters, mine shipped with the 4000k tint but 5000k and 6000k are also available. These are behind a narrow TIR optic and it creates a very nice narrow semi floody beam. It’s a very practical and useful beam for a variety of tasks in my opinion. The bezel does interfere ever so slightly at short ranges with the very outside of the spill with the narrow optics here. With my not so scientific Opple meter I registered 3780k with 95 CRI. You have to take those CRI numbers with a grain of salt, but they are high enough to consider “high CRI” for me. It’s a pleasant warmer tint. 

Officially Wurkkos rates this as making 3500 lumens with 217M of throw. That may be a little optimistic with these specific warmer LED’s and I suspect they achieved this using the cooler tint LED’s that typically have a small performance advantage. This is a FET driving light and there is PWM here, it’s how ramping is achieved. It’s not noticeable to the eye for me but my equipment can pick it up. Personally I didn’t notice any whining during ramping. For me Turbo pulled 7.8A at the tailcap with the included battery, so you don’t need a particularly high drain battery for this light. See my night shots section of the video version of this review for a full demonstration of the beam and some comparison with other lights.


Heat & Runtime

So for my heat and runtime tests I used the included Wurkkos branded (standard non proprietary)  5000mAh flat top battery. I calibrated the light to a 60C and ran two rounds of tests. The graphs are using the FL1 standard so 100% of relative output is taken at the 30 second mark. First was my standard Turbo test, where I take the light to its absolute top output and just let it go. In doing this I saw the light almost immediately start stepping down at about 25 seconds it then ran at about 100% output for a minute and a half as heat peaked just under 50C. This makes me rethink my thermal calibration may need to be revisited. I won’t lie if I said I didn’t struggle with this a bit. Anyways output continues to decrease and it stabilizes between 30-45% of relative output for another nearly 4 hours. Total runtime down to 1% relative output was just shy of 5 hours.

I then ran a runtime which was the top of the default ramp curve. For this is was able to sustain 100% relative output for a little longer and the total output graph was pretty similar. Active thermal management shows itself in both modes well with the light increasing output as it cools even though the battery voltage is declining. This is something Andruil does well. LVP was measured at 2.994V. 


The TS21 when it came out originally came with the Andruil 1.0 firmware by Toykeeper, but they are now shipping it with Andruil 2.0. This is my first light with Andruil 2.0 so it had a bit of a learning curve. I won’t pretend to be an Andruil expert, but I will say the diagram on how to navigate the light is absolutely critical to learning it and doing more advanced settings like setting the thermal calibration which I highly recommend doing. 

The light ships in Simple UI mode and this is a benefit of Anduril 2.0 as it’s your basic flashlight functions like turning on, increasing and decreasing brightness, battery check and lockout. It’s much easier to not end up in an advanced mode or get lost. Much better for more novice users or someone who wants something easier, that said it’s not calibrated so you can expect your runtimes to be less, especially at high outputs.


Your basic functions are ramping (Which can be switched to steps with 3 Clicks once on), double press to go to top of ram (Technically not turbo). In advanced mode you have the full range of features including all the blinking modes, changing the color of the auxiliary channel which on the TS21 is on the button, etc. You can see I somehow unintentionally turned my button LED to be on all the time in orange. You can of course go in and disable this. I think in time as I use Andruil 2 more I will like it but right now it’s a little confusing and not muscle memory yet. 



Recharging is done via the onboard USB-C charging port built into the light. The silicone port cover here fits well but is rounded so it does help it roll on it’s side. A note on the battery here, it’s a flat top 21700 that’s non proprietary which is fantastic to see. The light supports charging via USB-C PD but doesn’t benefit from a speed increase as a result. 

Recharging from LVP at 2.994v to full at 4.17v took 2:53:00 at a maximum of 1.85A at the very beginning of charging, with the bulk of charging a bit lower then that. This is well under 1C for this battery and safe for long term use. 


Final Thoughts

Wurkkos has made their name in offering quality lights that appeal to enthusiasts at affordable prices and the TS21 is no different. It’s nice and compact, I don’t generally EDC a 21700 light because of it’s size but this is small and compact enough that I would if I was anticipating needing the output or runtime here. Because of that size though and this having 3 emitters it does build heat quickly and ramps down. This may be a slight disappointment if your not used to that, my advice would be to calibrate the light, raise that ceiling but also don’t run the light on the maximum output if you don’t need it. 

Multiple body color options from launch, LED Tint choices including warm, neutral tints, and high CRI are great to see at this price range. The number of manufactures that offer this keep declining and I think it’s an important feature. I hope consumers appreciate this complexity this adds to production and inventory with lots of additional SKU’s. 


Andruil is an enthusiasts UI for sure, it’s not super simple, but Andruil 2 with it’s separation of simple UI from Advanced UI improves this so it’s still a easy to use flashlight if you want it to be without all the complications, but those power features are there too if you want. Just make sure you have a diagram handy if you want to venture into the Advanced UI. 

So I can recommend this one both to new users, and enthusiasts. It’s a compact light with good performance, emitter tint options, high CRI, and body colors with onboard charging. This updated version I tested here today is a good way to try out Andruil 2 if you don’t have a light with it. With the coupons Wurkkos has provided I can get the light shipped to me for under $40 next day with a battery, which I think is a great deal. 


How to Purchase the TS21

Pickup the Wurkkos TS21 from Amazon and save with the coupons below, or from Wurkkos direct (no coupon)


Gray from Amazon https://amzn.to/3rxyEFD Use code X5KSZIQH to save 20%

Black from Amazon WARNING THIS IS RUNNING Anduril 1 Read the listing carefully https://amzn.to/3Jb3byH Use code 5SDBMRK8 to save 20%


All colors from Wurkkos https://wurkkos.com/products/wurkkos-ts21-new-color-metal-gray-and-champagne-with-anduril-20-21700-led-flashlight-3sst20-3500lm?VariantsId=10082


Blue Splatter from Wurkkos https://wurkkos.com/products/%E3%80%90pre-sale%E3%80%91wurkkos-new-ts21-with-anduril-20-nichia-219c-5000k-usb-c-rechargeable-21700-led-flashlight-with-power-bank-function-magnet-tail?VariantsId=10154


20350 Tube for the TS21 https://wurkkos.com/products/20350-short-tube-tube-work-for-wurkkos-hd20-ts21


Diffuser for the TS21 https://wurkkos.com/products/wurkkos-white-diffuser-for-ts21-soft-composite-materials-bright-indoor-reading-hiking-tent-lighting-with-malleability?VariantsId=10156