Sofirn IF25A 4000K 2000lm In-depth review, Pros and Cons

4 x Luminus SST20 LEDs
2000 lm output
8000 cd intensity
1 x 21700 Li-Ion battery

The Sofirn IF25A 4000K (IF25A4000K) released in 2020. It uses 4 x Luminus SST20 LEDs, TIR reflector and 1 x 21700 Li-Ion battery. The powerful emitter in this flashlight provides up to 2000 lm output, 8000 cd intensity, and a beam distance of 179 m.

The IF25A 4000K is an impressive flashlight that offers both power and reliability. Its robust build and outstanding illumination make it a versatile lighting instrument. The IF25A 4000K flashlight recalls the last used mode. So, you don't need to access higher brightness levels unless you need to. You can use the strobe function as a self-defense tool. It provides a non-lethal way to deter or disorient attackers. The flashlight uses rechargeable batteries. You can recharge them with a USB cable connected to a power source.

Sofirn IF25A 4000K (IF25A4000K) pictures

Sofirn IF25A 4000K / IF25A4000K photo 1.
Sofirn IF25A 4000K / IF25A4000K photo 2.
Sofirn IF25A 4000K / IF25A4000K photo 3.
Sofirn IF25A 4000K / IF25A4000K photo 4.
Sofirn IF25A 4000K / IF25A4000K photo 5.
Sofirn IF25A 4000K / IF25A4000K

We base the specifications below on the official data published by the manufacturer, while also considering user reviews. If you found an error or something lacking in the specifications for the Sofirn IF25A 4000K, then tell us.

Sofirn IF25A 4000K (IF25A4000K) specifications

NameIF25A 4000K
Rated 3 / 5 based on 1387 user votes.

This Sofirn flashlight offers portability, versatility, and reliability in providing illumination.


Weight99 g
Length106.4 mm
Head diameter35 mm
Materialaluminium alloy with HAIII hard-anodized finish

An extremely lightweight handheld flashlight weighs 99 g. The best flashlight size depends on personal preference. It also depends on intended use and the specific features you want. Aluminium is a lightweight material, which is beneficial for IF25A 4000K flashlight. HAIII is a specific anodizing process. It creates a thicker and harder oxide layer than regular anodizing. This flashlight comes in a sleek black color option.


Emitter4 x Luminus SST20 LEDs
Color temperature4000 K
Lenstoughtened AR coated glass
Switchelectronic side

Luminus has established a positive reputation as a reliable LED manufacturer. Warm, white light is generally more comfortable. It's also less harsh on the eyes than cool, white light. The AR coating of the lens helps to reduce these reflections. It does this by changing the lens surface's refractive index. The electronic switches may have a higher chance of standby drain.


Flux2000 lm
Intensity8000 cd
Throw179 m
CD/LM factor4

The 2000 lm output of IF25A 4000K provides great flexibility. You can adjust the brightness to fit different needs. The IF25A 4000K flashlight has 8000 cd. It provides a much brighter and more intense beam. The throw distance is the farthest distance the flashlight can light an object. Candela per lumen (cd/lm) measures a flashlight's beam intensity. It compares this to its total luminous flux or output.

If accurate color is a priority for you, choose a flashlight with a CRI of 90 or above. The IF25A 4000K has a CRI of 90, it is useful in everyday use. Accurate color perception improves the visual experience..


Mode memoryyes
Ramping modeyes

The Anduril firmware is popular among flashlight enthusiasts. It is versatile, easy to use, and lets you customize flashlight behavior. The flashlight has mode memory. It remembers the mode you were using when the light was last turned off. It stays in that mode when you turn it on again. The IF25A 4000K flashlight has ramping mode. Its user interface lets you control the brightness by pressing and holding a button.

Designers created the strobe function to produce a disorienting or attention-grabbing effect. The SOS code starts three short signals. Then, three long signals follow. Finally, there are three short signals again.


Battery1 x 21700 Li-Ion battery
Battery indicatoryes
Charger portUSB Type-C
Thermal regulationyes

The IF25A 4000K flashlight's power source is 1 x 21700 Li-Ion battery. It provides reliable, long-lasting energy for top performance. The battery indicator prevents surprise power failures. It ensures the flashlight is ready when needed. USB rechargeable flashlights are more popular now. They are popular because they are convenient and sustainable. LVP (Low Voltage Protection) is designed to protect the battery. It stops over-discharging, which can reduce battery life or cause permanent damage.

The thermal protection feature helps prevent overheating. Overheating can harm the flashlight's performance, battery, and safety. The flashlight has an IPx8 rating. It can withstand being submerged in water beyond 1 meter for a prolonged period. The manufacturer specifies this.


Package contentsUSB Type-C cable

According to the ANSI/NEMA FL1 Standard, we measure the performance of the Sofirn IF25A 4000K flashlight 30 seconds after switching on the light. The ANSI/NEMA FL1 2009 Standard is a set of flashlight performance guidelines.

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