Fenix LR40R flashlight review

1 x Cree XP-L HI LED, 18 x Cree XP-G3 LEDs
12000 lm output
149382 cd intensity
4 x 18650 Li-Ion batteries

The Fenix LR40R flashlight was released in 2019. It uses 1 x Cree XP-L HI LED, 18 x Cree XP-G3 LEDs, SMO reflector and 4 x 18650 Li-Ion batteries. The powerful emitter in this flashlight provides up to 12000 lm output, 149382 cd intensity, and a beam distance of 773 m.

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

Table of Contents

  • Fenix LR40R 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 LR40R / LR40R

The LR40R flashlight offers a versatile lighting solution. This light has 4 + 5 modes of lighting. The LR40R's mode memory makes the flashlight start in your preferred or needed mode. The strobe function produces a high-frequency flashing light pattern. The flashlight is rechargeable easily via USB port.

Fenix LR40R specifications

Rated 4 / 5 based on 1510 user votes.

This flashlight can fit in pockets, backpacks, or glove compartments.

Fenix LR40R / 1

Body, materials, weight, colors

Weight500 g
Length154 mm
Body diameter51 mm
Head diameter80 mm
Materialaluminium alloy with HAIII hard-anodized finish

This 500 g flashlight is quite heavy for a handheld flashlight. A smaller flashlight is easier to carry in a pocket, bag, or pouch. Aluminium is a lightweight material, which is beneficial for LR40R flashlight. The HAIII coating resists corrosion well. The LR40R flashlight is available in black.

Fenix LR40R / 2

System, LED, lens, reflector

Emitter1 x Cree XP-L HI LED, 18 x Cree XP-G3 LEDs
Color temperature5500 K
LensAR coated glass
Switchdual electronic 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. The smooth reflector creates a well-defined hotspot at the center. The AR coating is thin and applied to the lens surface. Some flashlights with electronic switches have programmable features.

Performance, flux, intensity, throw

Flux12000 lm
Intensity149382 cd
Throw773 m
CD/LM factor12.45

The flashlight has 12000 lm, this is an extremely high lumen output. The flashlight has 149382 cd. This light can illuminate objects or areas with great brightness and clarity. The throw is the distance in meters at which the flashlight produces a light intensity of 0.25 lux. The candela per lumen (cd/lm) ratio can be used to determine if a flashlight has a spot or flood type beam.

Software, user interface, modes

Modes4 + 5 modes
Mode memoryyes
Ramping modeno

A flashlight's modes are different output settings or brightness levels. The flashlight has mode memory. It remembers the mode you were using when the light was last turned off. The LR40R 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.

Features, battery, protections

Battery4 x 18650 Li-Ion batteries
Battery indicatoryes
Charger portUSB Type-C
Thermal regulationyes

The LR40R flashlight utilizes 4 x 18650 Li-Ion batteries as its power source. A battery indicator lets users see the battery status. A flashlight's USB charger can be very useful. This is especially true in emergencies. 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 contentsUSB Type-C cable
battery pack
nylon holster
spare o-ring

The included battery lets you immediately use the flashlight for your desired applications. The package includes a holster to safely store your flashlight. When gripping the flashlight with the lanyard around your wrist, it gives a more secure hold. Instead of searching for matching O-rings, having spare O-rings allows quick fixes.

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.


  • aluminium body
  • AR coated lens
  • side switch
  • extremely powerful
  • super bright
  • multiple modes
  • mode memory
  • tactical strobe
  • SOS/beacon function
  • battery indicator
  • USB charger
  • low-voltage protection
  • thermal regulation
  • dust protected
  • waterproof
  • battery included
  • protective holster


  • no auxiliary LEDs
  • non-magnetic


Fenix LR40R / LR40R photo 1.
Fenix LR40R / LR40R photo 2.
Fenix LR40R / LR40R photo 3.
Fenix LR40R / LR40R


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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.