Sofirn IF25A 4000K flashlight review

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

The Sofirn IF25A 4000K flashlight was 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.

Want to find out if the Sofirn IF25A 4000K is good? Keep reading to know!

Table of Contents

  • Sofirn IF25A 4000K specifications
    • Body, materials, weight, colors
    • System, LED, lens, reflector
    • Performance, flux, intensity, throw
    • Software, user interface, modes
    • Features, battery, protections
    • Accessories, package contents
    • Links
  • Conclusion, pros and cons
  • Photos
  • Comparisons

The content of this article reflects our own experiences and viewpoints. We aim to offer insights on a topic, and we hope others find it helpful and motivating. Additionally, we make every effort to provide accurate and comprehensive coverage.

Sofirn IF25A 4000K / IF25A4000K

The flashlight is a must-have tool for outdoor activities, it offers guidance and safety. The IF25A 4000K flashlight recalls the last used mode. You can use the strobe function as a self-defense tool. The flashlight uses rechargeable batteries.

Sofirn IF25A 4000K specifications

NameIF25A 4000K
Rated 3 / 5 based on 1503 user votes.

This Sofirn flashlight offers portability, versatility, and reliability.

Sofirn IF25A 4000K / 2

Body, materials, weight, colors

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

An extremely lightweight handheld flashlight weighs 99 g. Consider the length of the flashlight, it should fit comfortably in your chosen way to carry it. The aluminium body of the IF25A 4000K has excellent thermal conductivity. 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.

Sofirn IF25A 4000K / 3

System, LED, lens, reflector

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. The AR coating of the lens helps to reduce reflections. The electronic switches may have a higher chance of standby drain.

Sofirn IF25A 4000K / 4

Performance, flux, intensity, throw

Flux2000 lm
Intensity8000 cd
Throw179 m
CD/LM factor4

The 2000 lm output of IF25A 4000K provides great flexibility. 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. 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.

Sofirn IF25A 4000K / 1

Software, user interface, modes

Mode memoryyes
Ramping modeyes

The Anduril firmware is popular among flashlight enthusiasts. The flashlight has mode memory. It remembers the mode you were using when the light was last turned off. The ramping mode has an advantage. It offers precise control over the light amount emitted by the flashlight. Designers created the strobe function to produce a disorienting or attention-grabbing effect. The SOS signal is an international distress call.

Features, battery, protections

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. The battery indicator prevents surprise power failures. USB rechargeable flashlights are more popular now. LVP (Low Voltage Protection) is designed to protect the battery. The thermal protection feature helps prevent overheating. The flashlight has an IPx8 rating. It can withstand being submerged in water beyond 1 meter for a prolonged period.

Accessories, package contents

Package contentsUSB Type-C cable

Official sitehttps://sofirnlight.com/

Conclusion, pros and cons

This Sofirn flashlight, like any other, has its strengths and weaknesses. Let's take a close look at both sides to understand this flashlight better. I share my thoughts on its standout features and the parts that might need improvement. Keep in mind, these are just my opinions, and you might have a different perspective.


  • lightweight
  • aluminium body
  • warm light
  • AR coated lens
  • side switch
  • adequate performance
  • superior CRI
  • Anduril firmware
  • mode memory
  • ramping mode
  • tactical strobe
  • SOS/beacon function
  • battery indicator
  • USB charger
  • low-voltage protection
  • thermal regulation
  • waterproof


  • no auxiliary LEDs
  • non-magnetic


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


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Updated: April 23, 2024

David Hagon
I love bushcraft and flashlights. I find joy in mastering wilderness survival skills and exploring the realm of illuminating gadgets. Bushcraft isn't just fun, it's a learning journey. I form a strong bond with nature. It's more than a hobby, it enriches me in practical and spiritual ways.