Astrolux S43S XP-L flashlight review

4 x Cree XP-L HI LEDs
4600 lm output
8464 cd intensity
1 x 18650 Li-Ion battery

The Astrolux S43S XP-L flashlight was released in 2020. It uses 4 x Cree XP-L HI LEDs, TIR reflector and 1 x 18650 Li-Ion battery. The powerful emitter in this flashlight provides up to 4600 lm output, 8464 cd intensity, and a beam distance of 184 m.

Want to know if the S43S XP-L is a game-changer? Stay with us!

Table of Contents

  • Astrolux S43S XP-L 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.

Astrolux S43S XP-L / S43SXPL

The flashlight is a must-have tool for outdoor activities, it offers guidance and safety. The S43S XP-L has TIR lenses, engineers design them to minimize light scattering and decrease lens artifacts. With mode memory, when you turn off the S43S XP-L and then turn it back on, it will activate the last used mode. The strobe function produces a high-frequency flashing light pattern. This USB rechargeable flashlight is small and light.

Astrolux S43S XP-L specifications

NameS43S XP-L
Rated 4 / 5 based on 1517 user votes.

This Astrolux flashlight is compact and handheld.

Astrolux S43S XP-L / 8

Body, materials, weight, colors

Weight60 g
Length88.7 mm
Head diameter27 mm
Materialcopper head, aluminium alloy body with HAIII hard-anodized finish

The 60 g flashlight may not provide the same level of brightness or features as larger models. The best flashlight size depends on personal preference. Aluminium is a lightweight material, which is beneficial for S43S XP-L flashlight. The HAIII process makes a hard and wear-resistant surface on the aluminum. This flashlight features a captivating black color.

Astrolux S43S XP-L / 1

System, LED, lens, reflector

Emitter4 x Cree XP-L HI LEDs
Color temperature5000 K, 6500 K
Switchelectronic side

Lighting professionals trust Cree LEDs. Cree LEDs have gained a strong reputation for quality and performance. The color temperature choice depends on the light's use and personal taste. This TIR lens offers flexibility. Some flashlights with electronic switches have programmable features.

Astrolux S43S XP-L / 7

Performance, flux, intensity, throw

Flux4600 lm
Intensity8464 cd
Throw184 m
CD/LM factor1.84

The S43S XP-L flashlight has 4600 lm. It will provide an exceptionally bright and powerful beam of light. The S43S XP-L flashlight has 8464 cd, it provides a much brighter and more intense beam. The throw distance is the farthest distance the flashlight can light an object. The candela per lumen (cd/lm) ratio can be used to determine if a flashlight has a spot or flood type beam.

Astrolux S43S XP-L / 6

Software, user interface, modes

Mode memoryyes
Ramping modeyes

NarsilM offers many customization options. They let users tailor the flashlight to their needs. The flashlight has mode memory. It remembers the mode you were using when the light was last turned off. The S43S XP-L 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 signal is commonly used in outdoor adventures or survival scenarios.

Astrolux S43S XP-L / 5

Features, battery, protections

Battery1 x 18650 Li-Ion battery
Battery indicatoryes
Charger portmicroUSB
Thermal regulationyes

The S43S XP-L flashlight utilizes 1 x 18650 Li-Ion battery as its power source. The battery indicator prevents surprise power failures. USB rechargeable flashlights are more popular now. The Low Voltage Protection helps save the battery's capacity. The thermal protection feature helps prevent overheating. The IPx6 rating indicates that the flashlight has a protection against water jets.

Astrolux S43S XP-L / 2

Accessories, package contents

Package contents18350 tube
spare o-ring
survival hammer

The clip allows you to attach this flashlight to a belt, pocket, backpack, or other items. The lanyard of the S43S XP-L protects the flashlight from accidental damage. Instead of searching for matching O-rings, having spare O-rings allows quick fixes.

Astrolux S43S XP-L / 4
Official sitehttps://flashlight.nitecore.com/

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.


  • lightweight
  • aluminium body
  • warm light
  • TIR lens
  • side switch
  • strong flux
  • NarsilM firmware
  • mode memory
  • ramping mode
  • tactical strobe
  • SOS/beacon function
  • battery indicator
  • USB charger
  • low-voltage protection
  • thermal regulation
  • waterproof
  • clip


  • no auxiliary LEDs
  • non-magnetic


Astrolux S43S XP-L / S43SXPL photo 1.
Astrolux S43S XP-L / S43SXPL photo 2.
Astrolux S43S XP-L / S43SXPL photo 3.
Astrolux S43S XP-L / S43SXPL photo 4.
Astrolux S43S XP-L / S43SXPL photo 5.
Astrolux S43S XP-L / S43SXPL photo 6.
Astrolux S43S XP-L / S43SXPL photo 7.
Astrolux S43S XP-L / S43SXPL photo 8.
Astrolux S43S XP-L / S43SXPL photo 9.
Astrolux S43S XP-L / S43SXPL


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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.