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Convoy M21B SST40 2300lm flashlight review: Pros and Cons

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

The Convoy M21B SST40 flashlight released in 2019. It uses Luminus SST40 LED, SMO 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.

Table of Contents

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 Convoy M21B SST40, then tell us.

Convoy M21B SST40 / M21BS

The flashlight is a must-have tool for outdoor activities. These include camping, hiking, and night-time exploration, it offers guidance and safety. This light has 4 modes of lighting. The M21B SST40's mode memory makes the user experience more seamless and intuitive.

Convoy M21B SST40 specifications

BrandConvoy
NameM21B SST40
TypeM21BS
Rating
Rated 4 / 5 based on 1438 user votes.
Launch2019
Formflashlight

This Convoy flashlight is compact and handheld. It is easy to carry and maneuver.

Convoy M21B SST40 / 5

Body, materials, weight, colors

Weight120 g
Length141.5 mm
Body diameter27.1 mm
Head diameter35.7 mm
Materialaluminium alloy with HAIII hard-anodized finish
Colorsblack

This 120 g flashlight is slightly heavier than most handheld flashlights. But, it is still at a reasonable weight. The best flashlight size depends on personal preference. It also depends on intended use and the specific features you want. The aluminum bodies can be anodized. This adds a protective layer and a wide range of color options for flashlight bodies. The HAIII coating is often matte or textured. This finish improves grip and feels nice in the hand. This flashlight features a captivating black color.

Convoy M21B SST40 / 1

System, LED, lens, reflector

EmitterLuminus SST40 LED
Color temperature6500 K / 5000 K
ReflectorSMO
LensAR coated glass
Switchmechanical rear, forward clicky

Luminus is a US-based LED manufacturer. In the lighting industry, it has gained recognition as reputable. Color temperature is a characteristic of light. It is used to quantify the color appearance of light sources. Flashlights use the smooth reflector when long-range light is important. This includes searchlights and thrower flashlights. The AR coating on the lens maximizes light transmission. This makes the flashlight more effective in darker environments.

The M21B SST40 uses multiple switches. The switches' placement and design determine this. They allow for one-handed operation. Mechanical switches often offer tactile feedback. Users can feel a distinct click or resistance when they press the switch. A simple press or click of the rear switch turns the flashlight on or off. This removes the need for complex button combinations or multi-step processes.

Convoy M21B SST40 / 2

Performance, flux, intensity, throw

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

The 2300 lm output of M21B SST40 provides great flexibility. You can adjust the brightness to fit different needs. The M21B SST40 flashlight has 40000 cd. It can light objects at greater distances. The throw distance is the farthest distance the flashlight can light an object. The cd/lm factor is the candela-to-lumen ratio. It shows how concentrated a light source's output is.

Convoy M21B SST40 / 3

Software, user interface, modes

Modes4 modes
Mode memoryyes
Ramping modeno
Strobeno
SOS/Beaconno

A flashlight's modes are different output settings or brightness levels. They can be chosen to meet different needs and preferences. 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.

Convoy M21B SST40 / 4

Features, battery, protections

Battery1 x 21700 Li-Ion battery
Battery indicatorno
Charger portno
LVPyes
Thermal regulationyes
ProtectionIPx7
AUX LEDsno
Magneticno

The Convoy M21B SST40 flashlight is powered by 1 x 21700 Li-Ion battery. The M21B SST40 doesn't have charger port. The Low Voltage Protection helps save the battery's capacity. It stops it from reaching a critically low voltage. The built-in thermal control adjusts brightness output to prevent overheating. The "7" in the IPx7 rating shows that the flashlight can survive being submerged in water. It can withstand a certain depth for a limited time without getting damaged.

Accessories, package contents

Package contentslanyard

The lanyard of the M21B SST40 protects the flashlight from accidental damage. It does this by stopping it from falling or hitting the ground.

According to the ANSI/NEMA FL1 Standard, we measure the performance of the M21B SST40 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 Convoy 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
  • AR coated lens
  • tactical switch
  • super bright
  • multiple modes
  • mode memory
  • low-voltage protection
  • thermal regulation
  • waterproof

Cons

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

Photos

Convoy M21B SST40 / M21BS photo 1.
Convoy M21B SST40 / M21BS photo 2.
Convoy M21B SST40 / M21BS photo 3.
Convoy M21B SST40 / M21BS photo 4.
Convoy M21B SST40 / M21BS photo 5.
Convoy M21B SST40 / M21BS photo 6.
Convoy M21B SST40 / M21BS

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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.
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