Lumintop FW4A SST20 flashlight review

4 x Luminus SST20 LEDs
2100 lm output
5625 cd intensity
1 x 18650 Li-Ion battery

The Lumintop FW4A SST20 flashlight was released in 2020. It uses 4 x Luminus SST20 LEDs, TIR reflector and 1 x 18650 Li-Ion battery. The powerful emitter in this flashlight provides up to 2100 lm output, 5625 cd intensity, and a beam distance of 150 m.

Curious if this Lumintop flashlight is great? Keep reading to find out!

Table of Contents

  • Lumintop FW4A SST20 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.

Lumintop FW4A SST20 / FW4ASST20

The FW4A SST20 flashlight offers a versatile lighting solution. It uses a TIR lens to form the beam pattern. The FW4A SST20 mode memory eliminates the need to cycle through modes. It provides convenience and saves time. You can use the strobe function as a self-defense tool.

Lumintop FW4A SST20 specifications

NameFW4A SST20
Rated 3 / 5 based on 1518 user votes.

A flashlight provides reassurance and confidence.

Lumintop FW4A SST20 / 4

Body, materials, weight, colors

Weight63 g
Length92.6 mm
Body diameter24.5 mm
Head diameter28.5 mm
Materialaluminium alloy with HAIII hard-anodized finish

The flashlight is lightweight and easy to handle for most people. A smaller flashlight is easier to carry in a pocket, bag, or pouch. The aluminium body of the FW4A SST20 has excellent thermal conductivity. Flashlight makers widely use HAIII coating. Factors can influence the color choice of the flashlight body.

Lumintop FW4A SST20 / 5

System, LED, lens, reflector

Emitter4 x Luminus SST20 LEDs
Color temperature4000 K
Switchelectronic rear

Luminus has established a positive reputation as a reliable LED manufacturer. Warm, white light is generally more comfortable. The TIR lens makes the LED light collimated. These beams maximize the usable lumens in the target area. The electronic switches may have a higher chance of standby drain. The rear switch of the FW4A SST20 is rugged and durable.

Lumintop FW4A SST20 / 1

Performance, flux, intensity, throw

Flux2100 lm
Intensity5625 cd
Throw150 m
CD/LM factor2.68

With 2100 lm, the FW4A SST20 flashlight will offer a brighter and more powerful beam of light. The FW4A SST20 flashlight has 5625 cd, it provides a much brighter and more intense beam. The throw is the distance in meters at which the flashlight produces a light intensity of 0.25 lux. 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. A CRI of 95 indicates extremely high color accuracy. It provides a near-perfect representation of colors.

Lumintop FW4A SST20 / 3

Software, user interface, modes

Mode memoryyes
Ramping modeyes

Anduril software offers many output modes. These include different brightness levels, strobe modes, beacon modes, and more. 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. The FW4A SST20 flashlight has a strobe function, it produces a rapid, repetitive flashing of light. The SOS flashes Morse code so you can signal for help when needed.

Lumintop FW4A SST20 / 2

Features, battery, protections

Battery1 x 18650 Li-Ion battery
Battery indicatorno
Charger portno
Thermal regulationyes

The FW4A SST20 flashlight's power source is 1 x 18650 Li-Ion battery. The FW4A SST20 cannot charge batteries. You may need an external charger to keep your battery going. This flashlight has built-in low voltage protection (LVP). It prevents damage from over-discharge. The built-in thermal control adjusts brightness output to prevent overheating. The "8" in the IPx8 rating means the highest level of protection.

Accessories, package contents

Package contents2 x spare o-rings

The clip is very helpful, it lets you quickly access your flashlight while keeping your hands free for other tasks. When using spare O-rings, follow the maker's instructions.

Official sitehttps://lumintop.com/

Conclusion, pros and cons

This Lumintop 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
  • body color options
  • warm light
  • TIR lens
  • tactical switch
  • superior CRI
  • Anduril firmware
  • mode memory
  • ramping mode
  • tactical strobe
  • SOS/beacon function
  • low-voltage protection
  • thermal regulation
  • waterproof
  • clip


  • no battery indicator
  • no built-in charger
  • no auxiliary LEDs
  • non-magnetic


Lumintop FW4A SST20 / FW4ASST20 photo 1.
Lumintop FW4A SST20 / FW4ASST20 photo 2.
Lumintop FW4A SST20 / FW4ASST20 photo 3.
Lumintop FW4A SST20 / FW4ASST20 photo 4.
Lumintop FW4A SST20 / FW4ASST20 photo 5.
Lumintop FW4A SST20 / FW4ASST20 photo 6.
Lumintop FW4A SST20 / FW4ASST20


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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.