VTIGER S2 UV Flat EDC Torch Review
VTIGER S2 UV#
- Specifications
- Introduction
- Torch in use
- Build quality
- LED, bezel, lens, reflector and beam
- Size and comparison
- User interface
- Batteries and charging
- Performance
- Beamshots
- Thermal Images
- Conclusion
- Price
- Product page
Specifications#
| Brand/model | VTIGER S2 UV |
|---|---|
| LED | Cool White, UV (Low 350mW, High 1000mW) |
| Maximum lumens | 1,600 lm |
| Maximum beam intensity | 7,225 cd |
| Maximum throw | 170 m |
| Battery | Built-in |
| Onboard charging | Yes (USB-C) |
| Material | Aluminium |
| Modes | 5 |
| Blinkies | Strobe |
| Reflector | OP |
| Waterproof | IPX7 |
| Review date | December 2025 |
Introduction#
The VTIGER S2 UV is a small flat-style EDC torch with a white light and a UV light.
VTIGER is a new brand.
Here is a video demonstration:
VTIGER kindly provided this torch for review. I have not been paid for this review nor have I held back my opinions of this torch.
Packaging#
The VTIGER S2 UV comes in a white VTIGER-branded box with an image of the torch on the front and details on the back.
The following is included in the box:
- VTIGER S2 UV.
- USB-A to USB-C charging cable.
- Lanyard.
- User manual.
User Manual#
Torch in use#
The torch feels small in my hand.
I like the ergonomics of how the pocket clip rests in my hand while my thumb is on the metal button.
It would be nice if the tail edges were chamfered a bit more. They are not sharp but the edges do dig into my palm slightly when holding the torch.
There is a one-way deep carry pocket clip near the head of the torch for pocket carrying the torch. This angle might help avoid burning a hole in your pants. That said, there is an electronic lockout mode.
There is a large lanyard hole and a very strong magnet in the tail.
The torch can tailstand.
Build quality#
The VTIGER S2 UV has a satin blue anodised finish (it looks slightly glossy). It is also available in other colours.
The button gives a satisfying click.
The USB-C port has a rubber cover.
Teardown#
The pocket clip and the cover for the battery compartment can be removed by unscrewing two screws.
The battery is soldered to the driver.
LED, bezel, lens, reflector and beam#
The VTIGER S2 UV has a cool white emitter and a 365nm UV emitter. Each has an orange-peel reflector, a glass lens anda bezel. There is also a dual-white version.
CCT, CRI, and duv#
I have taken Correlated Colour Temperature (CCT) and Colour Rendering Index (CRI, RA of R1-R8) measurements with the torch positioned one metre away from an Opple Light Master Pro III (G3).
The CCT is around 7000K, the CRI is around 70 and the Delta u, v is close to zero (pure white).
The beam produced has an intense white hot spot surrounded by a corona. There is a slightly dark ring about half way around the edge of the spill.
| Mode | CCT (K) | CRI (Ra) | x | y | Duv |
|---|---|---|---|---|---|
| Low | 6450 | 68.6 | 0.3138 | 0.3282 | 0.0022 |
| Medium | 6888 | 70.0 | 0.3078 | 0.3180 | 0.0000 |
| High | 6975 | 70.4 | 0.3068 | 0.3158 | -0.0006 |
| Turbo | 7540 | 72.4 | 0.3009 | 0.3054 | -0.0029 |
Calculate Duv from CIE 1931 xy coordinates
Dimensions and size comparison#
Dimensions#
I took the following measurements using a digital caliper.
| Measurement | Unit (mm) |
|---|---|
| Length | 93.43 |
| Width | 25.37 |
| Head height | 11.50 |
| Height with pocket clip | 16.57 |
Weight#
I took the following measurements using a digital scale.
| Weight | Unit (g) |
|---|---|
| Torch | 86.48 |
Size comparison with its competition#
From left to right: VTIGER S2 UV, Olight Arkfeld Ultra, Olight Arkfeld Pro, Wurkkos HD01
User interface#
The VTIGER S2 UV has an electronic switch on the side.
There are four main modes for the White Light: Low, Medium, High and Turbo.
There is a shortcut to Moonlight from off.
There is one blinky mode: Strobe.
The UV Light has a Low and a High mode.
| State | Action | Result |
|---|---|---|
| Any | Two clicks | Change between White Light and UV Light |
| Off | Click | On (mode memory) |
| Off | Press and hold | Moonlight |
| White Light | Press and hold | Cycle (Low, Medium, High, Turbo) |
| UV Light | Press and hold | Cycle (Low, High) |
| On | Click | Off |
| Any | Three clicks | Strobe |
| Off | Press and hold for 3 seconds | Lock |
| Locked | Click | White Light flashes twice |
| Locked | Press and hold for 3 seconds | Unlock |
Mode memory#
There is mode memory.
The torch will memorise the last used mode, except Strobe.
Strobe#
Strobe has an alternating frequency.
I measured Strobe with a Zoyi ZT-703S oscilloscope.
Battery level indicator#
There are four green battery level indicator above the button. The indicators will appear for 5 seconds when the torch is turned on.
| Colour | Battery level |
|---|---|
| Four green indicators | > 75% |
| Three green indicators | 50 - 75% |
| Two green indicators | 25 - 50% |
| One green indicator | 10 - 25% |
| One green flashing indicator | < 10% |
Pulse Width Modulation#
There is PWM but I did not notice any visible PWM (flickering).
I measured the PWM of the light with a Zoyi ZT-703S oscilloscope.
Low, Medium, High, Turbo
What I like about the UI#
- Shortcut to Moonlight from off.
- Simple to use.
- The battery status indicator lights turn off after 5 seconds when the torch is on. This is nice when using moonlight mode and I do not want the green lights lighting up my face.
What could be improved#
- A shortcut to Turbo from off would be nice.
- UV probably does not need to be memorised.
Batteries and charging#
Battery#
The torch has a built-in battery soldered to the driver with two wires.
Charging#
Power supply: PinePower Desktop USB-C
USB Meter: ChargerLAB Power-Z KM003C
Room temperature: 15 C
It took 2 hours 42 minutes to fully charge the torch at a rate of 5V/0.75A.
The four green battery status indicators each turned on as charging finished.
Power supply compatibility#
I tried the following power supplies with the included 10440 cell:
| Power supply | USB Type | Protocol | Does it charge? |
|---|---|---|---|
| PinePower Desktop | USB-C | PD | Yes |
| PinePower Desktop | USB-A | QC | Yes |
| PinePower Desktop | USB-A | Yes |
USB-C to USB-C charging works.
Performance#
Specifications from the user manual:
White Light#
| FL1 Standard | Turbo | High | Medium | Low | Moonlight | Strobe |
|---|---|---|---|---|---|---|
| Output (lumens) | 1,600 + 300 | 350 + 250 | 120 | 10 | 1 | 1,600 |
| Runtime | 30s + 2h | 1min + 2h 30min | 4h 12min | 62h | 19d | 2h |
| Beam Intensity (cd) | 7,225 | 1,444 | 506 | 46 | ||
| Beam Distance (metres) | 170 | 76 | 45 | 13 |
The back of the box says that Medium has a runtime of 2.8h while the user manual says 2.5h.
The back of the box says that Turbo has a beam intensity of 6,561 cd (162 metres) while the user manual says 7,225 cd (170 metres).
Both the box and the user manual are for the S2 UV so there appears to be a few discrepancies.
UV Light#
365nm
| FL1 Standard | UV High | UV Low |
|---|---|---|
| Output (mW) | 1,000 | 350 |
| Runtime | 3h | 7h 30min |
Lumen measurements#
| Mode | Specs | Lumens @turn on | Lumens @30 sec | Lumens @10 min |
|---|---|---|---|---|
| Low | 10 | 8 | 8 | 8 |
| Medium | 120 | 115 | 114 | 108 |
| High | 350 + 250 | 310 | 296 | 164 |
| Turbo | 1,600 + 300 | 1,218 | 330 | 159 |
Moonlight was too low for my DIY lumen tube to detect.
Note: Lumen measurements may be off by 10% with my DIY lumen tube.
Runtime graphs#
I used my own DIY lumen tube with a TSL2591 sensor and forked bmengineer’s project RuTiTe to record runtimes.
The room temperature was approximately 15 C.
Runtime#
Here is a summary of the runtime results:
| Mode | User manual | Runtime | Turn off |
|---|---|---|---|
| Turbo | 30s + 2h | 1h 53min 57s | 2h 17min 17s+ |
| High | 1min + 2h 30min | 1h 56min 9s | 2h 13min 17s+ |
| Medium | 4h 12min | 3h 5min 58s | 3h 28min 39s+ |
| Low | 62h | 24h+ | 24h+ |
“Runtime” is the time until the output reduces to 10% of the output at 30 seconds (as per the ANSI/PLATO FL1 2019 Standard).
“Turn off” is the time until my DIY lumen tube no longer detects more than one lumen.
“+” indicates that the light remained on after recording had stopped.
The runtimes are good but they fell slighty short from what VTIGER claimed.
Throw#
I took lux measurements with a UNI-T UT383BT at 30 seconds. Low was measured at one metre. Medium, High and Turbo were measured at five metres.
| Mode | Specs (cd) | Specs (m) | Candela measured (cd) | Distance (m) |
|---|---|---|---|---|
| Low | 46 | 13 | 47 | 13 |
| Medium | 506 | 45 | 825 | 57 |
| High | 1,444 | 76 | 2,375 | 97 |
| Turbo | 7,225 | 170 | 3,475 | 117 |
The beam distance for Turbo was shorter than the expected 170 metres but it is good nonetheless (117 meters for such a small light).
The user manual says Turbo is 7,225 cd (170 metres) while the back of the box says 6,561 cd (162 metres). Both the user manual and the box are for the S2 UV so there might be some mistake.
Beamshots#
I went to a local park and aimed the torch at a tree 70 metres away while using Turbo.
Beamshots were taken using a Sony RX100M2 using 3.2", f3.2, ISO 100, 5000K WB.
VTIGER S2 UV (Turbo)#
Olight Arkfeld Ultra (Turbo)#
Olight Arkfeld Pro (Turbo)#
Wurkkos HD01 Spot (Turbo)#
VTIGER S2 UV UV (Low)#
VTIGER S2 UV UV (High)#
Thermal Images#
I used a Zoyi ZT-R02 IR Thermography Multimeter to take thermal images of the torch while using Turbo.
Room temperature: 17 C
| Time (mm:ss) | Max Temperature |
|---|---|
| 00:00 | 25.4 C |
| 02:00 | 39.3 C |
| 04:00 | 40.4 C |
| 06:00 | 41.5 C |
| 08:00 | 42.5 C |
| 10:00 | 42.8 C |
The light reached 42 C after 10 minutes. The user manual mentions that it may reach 50 C on Turbo.
Conclusion#
Specifications aside, the VTIGER S2 UV a nice little EDC flashlight.
The cool white light produced is close to pure white (delta u, v close to zero).
The user interface is simple.
UV Light has Low and High modes.
VTIGER may have made some mistakes with some of the specifications such as the runtime for Medium, the beam distance for Turbo and the lumen output for the S2 UV on Turbo. The user manual and the specifications on the back of the box do not match perfectly and my test results were slightly different. Then again, this is a pre-production sample and VTIGER could fix the numbers on the user manual and the packaging.
A beam distance of 117 metres is still impressive for such a small light. The beam throws slightly further than a much bigger Olight Arkfeld Ultra.
If you are looking for a small and simple flat-style EDC flashlight then the VTIGER S2 UV might be a solid option.
Pros:#
- Good build quality.
- Good beam distance (Turbo fell short).
- Nice white beam (close to pure white).
- Small size.
- Simple user interface.
- Moonlight mode.
- UV has Low and High modes.
- Built-in USB-C charging with a battery status indicator.
- Deep carry pocket clip.
- Lanyard hole.
Cons:#
- Runtimes fell slightly short.
- Battery is soldered to the driver.
- Magnet in the tail is too strong.
- Lumen output is lower than expected (mistake with the user manual?).
- 70 CRI.
Price#
58% off for the first 3 days from 13th December 2025.
Product page#
VTIGER S2 UV on kickstarter.com (affiliate link)
I may earn a commission if you use an affiliate link or a promo code. This will help fund future torch reviews and tutorials.