Astrolux FT03 SST40 flashlight review

Luminus SST40 LED
2400 lm output
190000 cd intensity
1 x 26650 Li-Ion battery

The Astrolux FT03 SST40 flashlight was released in 2019. It uses Luminus SST40 LED, SMO reflector and 1 x 26650 Li-Ion battery. The powerful emitter in this flashlight provides up to 2400 lm output, 190000 cd intensity, and a beam distance of 872 m.

Curious to know if this Astrolux flashlight is top-notch? Stay tuned for the answer!

Table of Contents

  • Astrolux FT03 SST40 specifications
    • Body, materials, weight, colors
    • System, LED, lens, reflector
    • Performance, flux, intensity, throw
    • Software, user interface, modes
    • Features, battery, protections
    • Accessories, package contents
  • 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.

Astrolux FT03 SST40 / FT03SST40

The FT03 SST40 flashlight offers a versatile lighting solution. The FT03 SST40's mode memory makes the user experience more seamless and intuitive. It has a strobe function, which is one of the most effective self defense tools available. The FT03 SST40 may also support other charging methods.

Astrolux FT03 SST40 specifications

NameFT03 SST40
Rated 4 / 5 based on 1510 user votes.

This Astrolux flashlight offers portability, versatility, and reliability.

Astrolux FT03 SST40 / 4

Body, materials, weight, colors

Weight295 g
Length170 mm
Body diameter34.5 mm
Head diameter69.5 mm
Materialaluminium alloy with HAIII hard-anodized finish

The 295 g weight may provide advantages, such as increased durability. The best flashlight size depends on personal preference. The aluminium body of the FT03 SST40 has a reputation for being durable and strong. HAIII is a specific anodizing process, it creates a thicker and harder oxide layer than regular anodizing. This flashlight offers many color options.

Astrolux FT03 SST40 / 1

System, LED, lens, reflector

EmitterLuminus SST40 LED
Color temperature5000 K, 5700 K, 6500 K
LensAR coated glass
Switchelectronic side

Luminus is a US-based LED manufacturer. In the lighting industry, it has gained recognition as reputable. Color temperature is used to quantify the color appearance of light sources. Flashlights use the smooth reflector when long-range light is important. The AR coating on the lens maximizes light transmission. The flashlight has electronic switches.

Astrolux FT03 SST40 / 5

Performance, flux, intensity, throw

Flux2400 lm
Intensity190000 cd
Throw872 m
CD/LM factor79.17

The 2400 lm output of FT03 SST40 provides great flexibility. 190000 cd represents an extremely high level of brightness for a flashlight. The throw distance is the farthest distance the flashlight can light an object. The cd/lm factor is the candela-to-lumen ratio. It shows how concentrated a light source's output is.

Astrolux FT03 SST40 / 2

Software, user interface, modes

Mode memoryyes
Ramping modeyes

NarsilM firmware includes thermal regulation. It monitors and adjusts the flashlight's output based on temperature. The flashlight has mode memory. It remembers the mode you were using when the light was last turned off. The FT03 SST40's ramping mode is easy to use. It lets you smoothly change the output over its whole range. The FT03 SST40 flashlight has a strobe function, it produces a rapid, repetitive flashing of light. The SOS signal is commonly used in outdoor adventures or survival scenarios.

Astrolux FT03 SST40 / 3

Features, battery, protections

Battery1 x 26650 Li-Ion battery
Battery indicatoryes
Charger portUSB Type-C
Thermal regulationyes

The Astrolux FT03 SST40 flashlight is powered by 1 x 26650 Li-Ion battery. A battery indicator lets users see the battery status. A flashlight's USB charger can be very useful. This is especially true in emergencies. The Low Voltage Protection helps save the battery's capacity. The thermal protection feature helps prevent overheating. The "7" in the IPx7 rating shows that the flashlight can survive being submerged in water.

Accessories, package contents

Package contents2 x spare o-rings

When gripping the flashlight with the lanyard around your wrist, it gives a more secure hold. Replacing worn or damaged O-rings helps a lot.

Conclusion, pros and cons

This Astrolux 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.


  • aluminium body
  • body color options
  • warm light
  • AR coated lens
  • side switch
  • super bright
  • NarsilM 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


Astrolux FT03 SST40 / FT03SST40 photo 1.
Astrolux FT03 SST40 / FT03SST40 photo 2.
Astrolux FT03 SST40 / FT03SST40 photo 3.
Astrolux FT03 SST40 / FT03SST40 photo 4.
Astrolux FT03 SST40 / FT03SST40 photo 5.
Astrolux FT03 SST40 / FT03SST40 photo 6.
Astrolux FT03 SST40 / FT03SST40


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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.