The flashlight was sent to me by Sofirn for review.
Here’s the product’s link(non-affiliate): Sofirn IF19
The flashlight comes in white cardboard box.
The flashlight is seated into some laser cut foam to protect it during shipping.
Its accessories are placed into the little cardboard box on the top of the light.
The following accessories are included:
- 2 x replacement o-rings.
- Wrist strap.
- Sofirn branded 18350 battery w/ 850 mAh of capacity.
- USB Type-C charging cable.
The Sofirn IF19 is a compact throwe and is powered by a single 18350 cell.
It’s operated via an e-switch that’s mounted on the lower part of the head.
The switch is backlit and will shine up during normal operation or while charging to indicate the battery’s state.
Opposite to the e-switch, we find the charging interface of the light, which is sealed via a rubber flap.
A regular USB Type-C port is used for charging.
The front portion of the light includes a slightly protruding flat bezel, which protects the glass lens.
Looking into the head of the IF19, we can see a TIR lens along with a Luminous SST-40 emitter.
The head can be easily taken apart since the head isn’t glued to the body.
Here’s a closer look at the light’s LED board.
The back side of the head houses the driver board that’s press fit / glued into place.
A stiff copper spring is used as the positive termination point.
The tail of the light is flat and thus allows it to tail stand.
There’s also a lanyard loop on the side of the tail.
The tail houses a thick copper spring.
Both the head and tail threads are anodized, which allows the flashlight to get mechanically locked out.
User Interface
The Sofirn IF19 comes with a very nice user interface.
Here’s all the supported actions:
Turn on/off: Single press.
Mode Cycle / Ramping: Long press while on ( Low > Medium > High or Ramp-up/Ramp-down).
Turbo: Double press for any mode or off.
Moonlight: Long press while off.
Strobe: Triple press from any mode or off.
Lock: Quadruple press while off.
Unlock: Double press while locked.
Switch between Ramping / Regular Stepped Modes: Quadruple press while on.
Update 02/07/2024: The community seems to have found a way to disable the auto-lock feature of the driver. Have a read if interested: Sofirn IF19 auto lock mystery - (UN)SOLVED! (thanks @mcjtom for sharing!)
Output
Here’s my output measurements.
As we can see, the Sofirn IF19 pushes 1605 lumen at tun on, which is impressive for such a compact thrower.
Mode spacing looks good - of course, the flashlight’s firmware also supports stepless dimming.
No signs of visible PWM can be observed on any of the modes.
Power Regulation
Here’s the power regulation graph I’ve create using my bench power supply.
What we can see in the graph:
- The flashlight seems to be using a FET type of driver, since the output current is directly proportional to the input voltage.
- On its full operational voltage, the driver will draw up to 7.4 Amps. Of course, this measurement is taken via a power supply and thus this number will be lower depending on the internal resistance of the 18350 cell.
- No signs of power regulations are present.
Outdoor Beamshots
Finally, here’s some outdoor beamshots with the Sofirn IF19
Bottom Line
Overall, the Sofirn IF19 is a very impressive compact thrower.
It provides a tight beam of light, especially for its extra small dimensions.
The UI is good and the overall build quality is on point.
I’d have liked to see some better power regulation on the lower modes, but it’s hard to complain when this little pocket rocket sells for < $30.
