Convoy M21C SST40 2300lm In-depth review, Pros and Cons

Luminus SST40 LED
2300 lm output
98000 cd intensity
1 x 21700 Li-Ion battery

The Convoy M21C SST40 (M21CSST40) released in 2020. 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, 98000 cd intensity, and a beam distance of 626 m.

The M21C SST40 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. This light has 4 modes of lighting. With mode memory, when you turn off the M21C SST40 and then turn it back on, it will activate the last used mode.

Convoy M21C SST40 (M21CSST40) pictures

Convoy M21C SST40 / M21CSST40 photo 1.
Convoy M21C SST40 / M21CSST40 photo 2.
Convoy M21C SST40 / M21CSST40 photo 3.
Convoy M21C SST40 / M21CSST40 photo 4.
Convoy M21C SST40 / M21CSST40 photo 5.
Convoy M21C SST40 / M21CSST40 photo 6.
Convoy M21C SST40 / M21CSST40 photo 7.
Convoy M21C SST40 / M21CSST40 photo 8.
Convoy M21C SST40 / M21CSST40 photo 9.
Convoy M21C SST40 / M21CSST40 photo 10.
Convoy M21C SST40 / M21CSST40 photo 11.
Convoy M21C SST40 / M21CSST40

We base the specifications below on the official data published by the manufacturer, while also considering user reviews. If you found an error or something lacking in the specifications for the Convoy M21C SST40, then tell us.

Convoy M21C SST40 (M21CSST40) specifications

NameM21C SST40
Rated 3 / 5 based on 1382 user votes.

This Convoy flashlight offers portability, versatility, and reliability in providing illumination.


Weight275 g
Length163 mm
Body diameter28 mm
Head diameter55 mm
Materialaluminium alloy with HAIII hard-anodized finish

This 275 g flashlight is not very heavy. But, it is heavier than the average handheld flashlight. The best flashlight size depends on personal preference. It also depends on intended use and the specific features you want. Aluminium is a lightweight material, which is beneficial for M21C SST40 flashlight. The body of M21C SST40 flashlight treated with a Type III hard-anodized, anti-abrasive finish. The M21C SST40 flashlight comes in many colors. The choice of color can serve different purposes and preferences.


EmitterLuminus SST40 LED
Color temperature5000 K, 6500 K
LensAR coated glass
Switchmechanical rear, reverse clicky

People know Luminus LEDs for their efficiency, brightness, color accuracy, and long lifespan. The color temperature choice depends on the light's use and personal taste. The M21C SST40 uses a smooth reflector. A smooth reflector is different from an orange peel reflector. It has a polished, mirror-like surface. The AR coating of the lens helps to reduce these reflections. It does this by changing the lens surface's refractive index.

The M21C 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. The rear switch of the M21C SST40 is usually operated with the thumb or finger. This makes it easy to reach and use.


Flux2300 lm
Intensity98000 cd
Throw626 m
CD/LM factor42.61

The 2300 lm output of M21C SST40 provides great flexibility. You can adjust the brightness to fit different needs. The flashlight has 98000 cd. It will provide a strong beam of light. This light can illuminate objects or areas with great brightness and clarity. 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.


Modes4 modes
Mode memoryyes
Ramping modeno

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.


Battery1 x 21700 Li-Ion battery
Battery indicatorno
Charger portno
Thermal regulationyes

The M21C SST40 flashlight utilizes 1 x 21700 Li-Ion battery as its power source. The M21C SST40 doesn't have charger port. LVP (Low Voltage Protection) is designed to protect the battery. It stops over-discharging, which can reduce battery life or cause permanent damage. The M21C SST40 has thermal protection feature. These mechanisms track and regulate the flashlight's temperature as it operates.


Package contents2 x spare o-ring

Instead of searching for matching O-rings, having spare O-rings allows quick fixes.

According to the ANSI/NEMA FL1 Standard, we measure the performance of the Convoy M21C SST40 flashlight 30 seconds after switching on the light. The ANSI/NEMA FL1 2009 Standard is a set of flashlight performance guidelines.

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