Sofirn SD01 6000lm In-depth review, Pros and Cons

3 x Luminus SST40 LEDs
6000 lm output
64162 cd intensity
4 x 18650 Li-Ion batteries

The Sofirn SD01 (SD01) released in 2021. It uses 3 x Luminus SST40 LEDs, SMO reflector and 4 x 18650 Li-Ion batteries. The powerful emitter in this diving light provides up to 6000 lm output, 64162 cd intensity, and a beam distance of 507 m.

This light has 4 modes of lighting. The memory function is a nice feature, the light will remember the last used mode.

Sofirn SD01 (SD01) pictures

Sofirn SD01 / SD01 photo 1.
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Sofirn SD01 / SD01

The specifications below are based on the official data published by the manufacturer, but we also take user reviews into consideration. If you found an error or something lacking in the specifications above for the Sofirn SD01, then don’t hesite and signal the problem to us.

Sofirn SD01 (SD01) specifications

Rated 4 / 5 based on 1144 user votes.
Formdiving light


Weight558 g
Length147 mm
Head diameter76.5 mm
Materialaluminium alloy with HAIII hard-anodized finish

This 558 g flashlight is quite heavy for a handheld flashlight. The ideal length of a flashlight depends on personal preference, intended use, and the specific features and functionality you're looking for. The aluminium body of SD01 has excellent thermal conductivity, meaning it can effectively dissipate heat generated by the flashlight's components. HAIII coating is widely used in the flashlight industry due to its durability, corrosion resistance, improved grip, and aesthetic appeal. The SD01 flashlight is offered in a stylish black color.


Emitter3 x Luminus SST40 LEDs
Color temperature5500 K
Switchrotary front

The US-based Luminus is recognized as a reputable LED manufacturer in the lighting industry. Color temperature is a characteristic of light. It is used to quantify the color appearance of light sources, particularly white light. The SD01 has a smooth reflector. The properly focused smooth reflector gives you a more cohesive hotspot and therefore throws better.


Flux6000 lm
Intensity64162 cd
Throw507 m
CD/LM factor10.69

With 6000 lm, the SD01 flashlight will provide an exceptionally bright and powerful beam of light. 64162 cd represents an extremely high level of brightness for a flashlight. The throw is the calculated distance in meters at which the flashlight produces a light intensity of 0.25 lux. The cd/lm factor (candela-to-lumen ratio) provides information about how concentrated or focused the light output of a light source is.


Modes4 modes
Mode memoryyes
Ramping modeno

Modes on a flashlight refer to different output settings or levels of brightness that can be selected to suit different needs and preferences. Mode memory means that the flashlight will remember the mode you were using when the light was last turned off, and when you turn it on again.


Battery4 x 18650 Li-Ion batteries
Battery indicatorno
Charger portno
Thermal regulationyes
ProtectionIPx8, depth 100 meters
Impact resistance1 m

The Sofirn SD01 flashlight is powered by 4 x 18650 Li-Ion batteries. The SD01 cannot charge batteries directly. You may need an external charger to keep your battery going. When the flashlight detects that the voltage of the battery has dropped to a certain threshold, it automatically reduces or cuts off the power output. The built-in thermal control automatically adjusts brightness output to prevent overheating.

The "8" in the IPx8, depth 100 meters rating indicates the highest level of protection against water ingress. The SD01 flashlight proudly boasts an exceptional impact resistance rating of 1 m.


Package contents2 x spare o-rings

The lanyard of SD01 helps protect the flashlight from accidental damage by preventing it from falling or hitting the ground. Regularly replacing worn or damaged O-rings helps maintain the overall durability and performance of the flashlight.

The performance of the Sofirn SD01 flashlight is measured according to the ANSI / NEMA FL1 Standard 30 seconds after switching the light on. The ANSI/NEMA FL1 2009 Standard is a set of flashlight performance guidelines.

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