Sofirn SD01 (2021) review

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.

Table of contents:

Sofirn SD01 (SD01) specifications

Rated 3/5 based on 808 user votes.
Formdiving light


The aluminium body of flashlight treated with a Type III hard-anodized, anti-abrasive finish.

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


The emitter of SD01 manufactured by Luminus, a US-based LED manufacturer. The SD01 has a smooth reflector. The properly focused smooth reflector gives you a more cohesive hotspot and therefore throws better.

Emitter3 x Luminus SST40 LEDs
Color temperature5500 K
Switchrotary front


The throw is the calculated 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. Well-focused spot beams can be over 100 cd/lm, tactical flashlights are typically between 20-100 cd/lm, and work lights are less than 10 cd/lm.

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


The SD01 has mode memory. Mode memory means that the light will remember the mode you were using when the light was last turned off, and when you turn it on again.

Modes4 modes
Mode memoryyes
Ramping modeno


The SD01 cannot charge batteries directly. You may need an external charger to keep your battery going. This flashlight has a built-in low voltage protection (LVP) to prevent damage to the cell from over-discharge, so protected cells are not necessary. The built-in thermal control automatically adjusts brightness output to prevent overheating.

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


The lanyard prevents accidental loss of the flashlight.

Package contents2 x spare o-rings

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.

The specifications above 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) pictures

Sofirn SD01 / SD01 photo Sofirn SD01 / SD01 photo Sofirn SD01 / SD01 photo Sofirn SD01 / SD01 photo Sofirn SD01 / SD01 photo Sofirn SD01 / SD01 photo Sofirn SD01 / SD01 photo Sofirn SD01 / SD01 photo Sofirn SD01 / SD01 photo
Sofirn SD01 / SD01

Sofirn SD01 (SD01) comparisons

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