Fenix LD42 flashlight review

1000 lm output
30625 cd intensity
4 x AA batteries

The Fenix LD42 flashlight was released in 2019. It uses Cree XP-L HI LED, SMO reflector and 4 x AA batteries. The powerful emitter in this flashlight provides up to 1000 lm output, 30625 cd intensity, and a beam distance of 350 m.

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

Table of Contents

  • Fenix LD42 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.

Fenix LD42 / LD42

The flashlight is a must-have tool for outdoor activities, it offers guidance and safety. This light has 5 modes of lighting. This flashlight does not have memory function.

Fenix LD42 specifications

Rated 4 / 5 based on 1489 user votes.

A flashlight provides reassurance and confidence.

Fenix LD42 / 1

Body, materials, weight, colors

Weight100 g
Length159.5 mm
Body diameter32.5 mm
Head diameter34 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 LD42 has a reputation for being durable and strong. Flashlight makers widely use HAIII coating. The LD42 flashlight is available in black.

Fenix LD42 / 2

System, LED, lens, reflector

EmitterCree XP-L HI LED
Color temperature6000 K
LensAR coated glass
Switchrotary front

Cree is a US-based LED manufacturer. It is well-regarded for its high-quality products and innovation in lighting. Color temperature is used to quantify the color appearance of light sources. The LD42 has a smooth reflector. It gives you a better hotspot, and it throws better. The AR coating is thin and applied to the lens surface.

Performance, flux, intensity, throw

Flux1000 lm
Intensity30625 cd
Throw350 m
CD/LM factor30.63

With 1000 lm, the LD42 flashlight will offer a brighter and more powerful beam of light. The LD42 flashlight has 30625 cd, it can light objects at greater distances. The throw is the distance in meters at which the flashlight produces a light intensity of 0.25 lux. The cd/lm factor is the candela-to-lumen ratio. It shows how concentrated a light source's output is.

Software, user interface, modes

Modes5 modes
Mode memoryno
Ramping modeno

A flashlight's modes are different output settings or brightness levels.

Features, battery, protections

Battery4 x AA batteries
Battery indicatorno
Charger portno
Thermal regulationyes

The Fenix LD42 flashlight is powered by 4 x AA batteries. The LD42 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 "6" in the IP68 rating shows the level of protection. The "8" in the IP68 rating means the highest level of protection.

Accessories, package contents

Package contents4 x AA batteries
nylon holster
spare o-ring

The package includes a holster to safely store your flashlight. The clip is useful to keep the light secured in your pocket. The lanyard of the LD42 protects the flashlight from accidental damage. Replacing worn or damaged O-rings helps a lot.

Official sitehttps://www.fenixlighting.com/

Conclusion, pros and cons

This Fenix 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
  • AR coated lens
  • rotary switch
  • adequate performance
  • super bright
  • multiple modes
  • low-voltage protection
  • thermal regulation
  • dust protected
  • waterproof
  • protective holster
  • clip


  • cool light
  • no mode memory
  • no battery indicator
  • no built-in charger
  • no auxiliary LEDs
  • non-magnetic


Fenix LD42 / LD42 photo 1.
Fenix LD42 / LD42 photo 2.
Fenix LD42 / LD42 photo 3.
Fenix LD42 / LD42


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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.