Wurkkos HD04 Pocket Flashlight Review
The Wurkkos HD04 Pocket flashlight has a multi-angle rotating head, spot, flood, and RGB LEDs. USB-C charging and a glow-in-the-dark body finish the package.
Official Specs and Features
Here’s a link to the Wurkkos HD04 Pocket flashlight product page.
Versions
The Wurkkos HD04 Pocket flashlight is available in one version but three body colors: black, white, and blue.
Price
All body colors of the Wurkkos HD04 Pocket flashlight are priced at $27.99.
What’s Included
- Wurkkos HD04 Pocket flashlight
- Charging cable
- Lanyard
- Manual
Package and Manual
Build Quality and Disassembly
The Wurkkos HD04 Pocket flashlight has a plastic body. The head is metal, and that should help with heat management of this 750-lumen (claimed) light.
One of the main selling points of the Wurkkos HD04 Pocket flashlight is the rotating head. Wurkkos describes it as “95° tilt + 180° rotation.” It’s very neat and could be useful.
The body being plastic means I didn’t disassemble the light at all.
Size and Comps
71mm x 23.8mm x 36.8mm and 56g.
Here’s the light in hand:
Here’s the test light with the venerable Convoy S2+. The version below is a custom laser-engraved Convoy S2+ host by GadgetConnections.com. I did a full post on an engraved orange host right here! Or go straight to GadgetConnections.com to buy your Convoy S2+ now!
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 Wurkkos HD04 Pocket flashlight package includes a lanyard. This lanyard attaches through a hole in the clip area of the back of the HD04.
It’s a very simple lanyard.
The clip is also a reasonable and good means for holding the light in place. The mouth opens very wide!
At the bottom of this light is a magnet. The light weighs little, and the magnet is sufficient for holding it. It’s during magnet use that the tilting and rotating head really shine!
Power and Runtime
The Wurkkos HD04 Pocket flashlight uses a built-in 600mAh LiPO.
I wouldn’t have expected this light to get anywhere near 750 lumens, but it does a remarkable job – it’s still at 627 lumens after 30 seconds, and around 600 after 1.5 minutes. Not bad at all.
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 Wurkkos HD04 Pocket flashlight has an uncovered USB-C charging port on the head. It still maintains an IPX6 waterproof rating.
Wurkkos includes a USB-C to USB-C charging cable.
Charging is very consistent with A to C or C to C. Both look great. A full charge takes about an hour and a third.
Modes and Currents
| Mode | Mode Claimed Output (lm) | Claimed Runtime | Measured Lumens |
|---|---|---|---|
| Spotlight – Turbo | 750 – 260 | 1m + 1h20m | 664 (0s) 627 (30s) |
| Spotlight – High | 375 – 260 – 150 | 5m+35m+1h15m | 324 (0s) 321 (30s) |
| Spotlight – Medium | 110 | 4h | 94 |
| Spotlight – Low | 10 | 38h | 9.5 |
| Spotlight – Moonlight | 1 | 86h | 1.04 |
| Floodlight – High | 450 – 150 | 3m+1h30m | 372 (0s) 345 (30s) |
| Floodlight – Medium | 100 | 2h50m | 84 |
| Floodlight – Low | 10 | 29h | 8.5 |
| Floodlight – Moonlight | 1 | 75h | 0.6 |
Pulse Width Modulation
The top row here is the spot output. The bottom row is four modes of flood, and the rightmost is the RGB channel. RGB is the only output to utilize 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
There are two switches on the Wurkkos HD04 Pocket flashlight. One is the Mode button, and the other is the Brightness button (according to the manual names).
The switches are fine and have good action. They seem to have a metal cover and be generally identical.
Here’s a user interface table!
| State | Action | Result |
|---|---|---|
| Off | Click the Power button | On (output and level memory) |
| Off | Click the Mode button | Red blinking (may be battery indicator) |
| Off | Hold the Power button | White: lowest level RGB: On and then immediately advance RGB output |
| On | Hold the Power button | Advance mode of current LED |
| Spot on | Double click power | Spot Turbo |
| Highest, either white mode | Double click power button | Iterate between highest and lowest levels |
| On | Click Power 3x | Strobe |
| Strobe | Click Power 2x | Strobe Advance (Strobe > SOS > Beacon) |
| RGB on | Click Power 2x | Dynamic RGB options advance (Flashing (Red and blue) > Stepless Gradient Dimming > Warning Flash > Full-color breathing) |
| On | Click Mode | Advance output options (Spot > Flood > RGB) |
| RGB on | Hold the Power button | RGB Advance |
LED and Beam
I don’t know that Wurkkos states what these emitters are, but I read (somewhere) that both white emitters are Luminus SST20. They’re vastly different in CCT, though. All three emitters are behind a TIR.
The names are accurate – flood is floody, and spot has a nice, tight profile.
LED Color Report (CRI and CCT)
The Spot emitter is low CRI and high(ish) CCT, peaking at around 6100K. The flood emitter, on the other hand, is high CRI and warm, staying right around 3900K. The flood emitter is very pleasant! It’s the second row, below.
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 HD04 pocket flashlight is a fun gadget! I am very pleased with the flood emitter, because it’s warm and high CRI. The spot emitter is fine because it has a distinct and useful spot. It’s also reasonably high output (especially for such a small light). It’d be great if the battery were user-replaceable. If you need RGB, this is a good, inexpensive way to get it.
The Big Table
| Wurkkos HD04 pocket flashlight | |
|---|---|
| Emitter: | Lumius SST20 (Spot and Flood |
| Price in USD at publication time: | $27.99 |
| 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 | Generally, yes, but not all modes. |
| Claimed Lumens (lm) | 750 |
| Measured Lumens (at 30s) | 627 (83.6% of claim)^ |
| Candela per Lumen | 7.5 |
| Claimed Throw (m) | 120 |
| Candela (Calculated) in cd (at 30s) | 238lux @ 4.52m = 4862cd |
| Throw (Calculated) (m) | 139.5 (116.3% of claim)^ |
| Claimed CCT | – |
| Measured CCT Range (K) | 3800-6100 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
- Gadget factor
- High CRI, warm flood channel
What I don’t like
- Battery can’t be replaced
- Opposing buttons mean you can’t squeeze to activate
Notes
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