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Fireflies

Fireflies E01 flashlight review

Luminus SST40 LED
2300 lm output
40000 cd intensity
1 x 21700 Li-Ion battery

The Fireflies E01 flashlight was released in 2019. It uses Luminus SST40 LED, TIR reflector and 1 x 21700 Li-Ion battery. The powerful emitter in this flashlight provides up to 2300 lm output, 40000 cd intensity, and a beam distance of 400 m.

Curious if this Fireflies flashlight is a real gem? Keep following along!

Table of Contents

  • Fireflies E01 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. If you found an error or something lacking in the specifications for the Fireflies E01, then tell us.

Fireflies E01 / E01

The E01 is a powerful and reliable flashlight. It has impressive illumination and durable construction. It is an exceptional lighting tool, it works in many situations and environments. TIR technology minimizes hotspots, dark spots, and irregularities in the beam of E01. The E01 mode memory eliminates the need to cycle through modes. You don't have to do this each time you turn on the flashlight. It provides convenience and saves time. You can use the strobe function as a self-defense tool. It provides a non-lethal way to deter or disorient attackers.

Fireflies E01 specifications

BrandFireflies
NameE01
TypeE01
Rating
Rated 4 / 5 based on 1455 user votes.
Launch2019
Formflashlight

Flashlights are unlike ambient or overhead lights. They let you aim the light where you need it.

Fireflies E01 / 5

Body, materials, weight, colors

Weight96 g
Length120 mm
Body diameter26 mm
Head diameter34 mm
Materialaluminium alloy with HAIII hard-anodized finish
Colorsblack
silver

The E01 is small, compact, and designed for ultra-portability. The best flashlight size depends on personal preference. It also depends on intended use and the specific features you want. The aluminium body of the E01 has excellent thermal conductivity. This means it can effectively dissipate heat generated by the flashlight's components. The body of E01 flashlight treated with a Type III hard-anodized, anti-abrasive finish. Factors can influence the color choice of the flashlight body. These include intended use, environment, personal style, and requirements.

Fireflies E01 / 3

System, LED, lens, reflector

EmitterLuminus SST40 LED
Color temperature5700 K
ReflectorTIR
LensTIR
Switchelectronic side

Luminus has established a positive reputation as a reliable LED manufacturer. Warm, white light is generally more comfortable. It's also less harsh on the eyes than cool, white light. The TIR lens of the E01 can reduce light loss. To achieve high light output, it captures and redirects much of the emitted light. The electronic switches may have a higher chance of standby drain.

Fireflies E01 / 2

Performance, flux, intensity, throw

Flux2300 lm
Intensity40000 cd
Throw400 m
CD/LM factor17.39

With 2300 lm, the E01 flashlight will offer a brighter and more powerful beam of light. The E01 flashlight has 40000 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. Candela per lumen (cd/lm) measures a flashlight's beam intensity. It compares this to its total luminous flux or output.

Fireflies E01 / 4

Software, user interface, modes

FirmwareAnduril
Mode memoryyes
Ramping modeyes
Strobeyes
SOS/Beaconyes

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. It stays in that mode when you turn it on again. The ramping mode has an advantage. It offers precise control over the light amount emitted by the flashlight. Designers created the strobe function to produce a disorienting or attention-grabbing effect. The SOS code starts three short signals. Then, three long signals follow. Finally, there are three short signals again.

Fireflies E01 / 1

Features, battery, protections

Battery1 x 21700 Li-Ion battery
Battery indicatoryes
Charger portno
LVPyes
Thermal regulationyes
ProtectionIPx8
AUX LEDsno
Magneticno

The E01 flashlight's power source is 1 x 21700 Li-Ion battery. It provides reliable, long-lasting energy for top performance. The battery indicator prevents surprise power failures. It ensures the flashlight is ready when needed. The E01 cannot charge batteries. You may need an external charger to keep your battery going. The flashlight detects when the battery's voltage has dropped to a certain level. Then, it reduces or cuts off the power.

The thermal protection feature helps prevent overheating. Overheating can harm the flashlight's performance, battery, and safety. The "8" in the IPx8 rating means the highest level of protection. It is against water ingress.

Accessories, package contents

Package contentslanyard
spare o-ring

The lanyard of the E01 protects the flashlight from accidental damage. It does this by stopping it from falling or hitting the ground. When using spare O-rings, follow the maker's instructions. Use their guidelines for proper installation.

According to the ANSI/NEMA FL1 Standard, we measure the performance of the E01 flashlight 30 seconds after switching on the light. The ANSI/NEMA FL1 2009 Standard is a set of flashlight performance guidelines.

Conclusion, pros and cons

This Fireflies 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.

Pros

  • lightweight
  • aluminium body
  • body color options
  • TIR lens
  • side switch
  • super bright
  • Anduril firmware
  • mode memory
  • ramping mode
  • tactical strobe
  • SOS/beacon function
  • battery indicator
  • low-voltage protection
  • thermal regulation
  • waterproof

Cons

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

Photos

Fireflies E01 / E01 photo 1.
Fireflies E01 / E01 photo 2.
Fireflies E01 / E01 photo 3.
Fireflies E01 / E01 photo 4.
Fireflies E01 / E01 photo 5.
Fireflies E01 / E01 photo 6.
Fireflies E01 / E01

Fireflies E01 comparisons

According to our statistics, the Fireflies E01 flashlight was most often compared on our site with the following flashlights.

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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.