[Update]Wurkkos dual LEDs 21700 Headlamp design Photos/UI update~

Almost expected. It’s Sofirn’s ATR (Advanced Thermal Regulation) that oscillates like crazy. First noticed it on the SP33 v3. Keep it cool and it will be fine.

On the other hand: If you use lower levels, you get a hell of runtime from this light, even with an inefficient PWM regulated direct-drive driver.

Has anyone modded theirs yet? I want to swap the XP-L HD for SST-20 4000k 95CRI, but it seems like the bezel is glued. I can’t get it to budge at all. I’m only a novice modder, not sure where to go from there.

Good taste :slight_smile: SST-20 is one of the best choices for a thrower flashlight. It can not output too much, but tint-wise, it is the best for thrower flashlights.

Before the emitter choices were finalized, I highlighted LH351*C* for better throw (C has smaller light emitting surface than D), but they insisted on the Cree crap. And they managed to choose the worse out of two. They mentioned XP-L, and common sense would suggest usage of XP-L HI, if it is meant to be a thrower, and not XP-L HD. While XP-L HI is not high CRI, it is at least good regarding tint shift. XP-L HD is not only just same not high CRI, but also much worse with the tint shift within the beam, and they chose that :person_facepalming:

My proposal for this headlamp was:
5000K LH351*C* for the thrower part of the headlamp
and
4000K or 5000K LH351*D* for the flooder part.

That would let both decent output, and a decent 90 CRI for the whole headlamp.

It is still not too late to make better decisions, I just hope, they will reconsider this.

Also, powerbank function does NOT work with my Pixel 4 when using a C to C cable, but it DOES work when using a C to A cable with an A-to-C adapter.

Hold the phone! So…you use a regular C-A cable (that you might use to charge your phone from a charger), and you…add this thing to adapt USB-A end to USB-C so it fits the USB-C port on the HD20?

https://www.amazon.com/Syntech-Adapter-Thunderbolt-Compatible-MacBook/dp/B07CVX3516

Correct, this worked for me. Specifically, I used the A to C adapter that came with my Pixel 4. Obviously, I can’t guarantee it will work for you.

My Pixel 3a charges with the same kind of adaptor (so C-A-C but not C-C) but at well under 1A. Anyone got it to fast charge a phone?

It will output max 1.6 A, but if the phone detects an old-style adapter (like which is emulated with the C-A-C adapter) it might limit charging to less than 1 A.

Here’s my review of the HD20, with lots of images: Wurkkos HD20 headlamp review – Dave's Tech Reviews

All round it’s a great light. As others have mentioned, the choice of LEDs is a bit odd but works well enough.

Still haven’t got it to work as a powerbank with a C-C cable.

I tested it with a USB load and it can push out more than 1.6A but then the voltage starts to drop really low (about 4.3V at 2A or something)

Great Flashlight

would you please try triple click to change LED modes, the speed of LED change seems more like step dimming not like LED modes change speed.

LED modes change (spot light-floodlight—both) by
1: triple click
2: click + hold

Thanks for the feedback, and we have update to the engineer for checking again.

In the video I tried to change the brightness with long click, but the LEDs were not in sync. Switching LED mode with click-click&hold and triple click worked fine.

copy that, thank you, we will update to engineer and update it on the next batch

Perhaps gets some fins on it instead of the shallow grooves, it looks very cheap. I mentioned magnetic charging because it frees up more head room for fins.

The Skilhunt H04 RC has such a nice look. That’s my demo video for my website.

Ditch the dual LEDs and make a single with a diffuser. There have been quite a few asking Sofirn for an SP40 V2 with diffuser but it never went ahead. Even a diffuser on a hinge like Skilhunt’s failed F model. Great concept but execution was terrible.

this magnetic charging is really cool

Yea, rip off Skilhunt host and sell it for 10$. Im in for few.

Here is the review I did of the light Wurkkos HD20 Review ($40, LH325D, 5000k, USB-C PD, 21700, Headlamp) The manual really needs to be updated to reflect the triple click to switch between LEDs.

Good review

Shows how Sofirn haven’t sorted their thermal regulation issue, this puts me off big time. I can’t understand how Sofirn aren’t picking this up when they’re testing the runtime, how is this missed, or do they simply not care?

See here, my proposal to represent the actual UI:

https://budgetlightforum.com/t/-/62231/269

I will be checking with Wurkkos what parts of the UI will need to be changed in batch #2 or #3 and what can be kept. Once everything is (double-)confirmed, I think the (printed) manual will be updated.