Good review, thanks 
But are there real plants in fish tank?
On TLF, Adelina reported that the magnetic ring will undergo a revision to have less play.
I wonder if there’s a chance for a couple of other improvements:
- color temperature 5000K
- no time-based stepdown
- orange or yellow anodization
- firefly mode (i.e., firefly - off - low - mid -high) for use on land
Shouldn’t cause to much work or money to do it right .
Regarding stepdowns and Sofirn's ATR this is what I have suggested to Sofirn in general...
- Please remove timer-triggered stepdowns from future drivers/flashlights. There is hardly any reason to have
both thermal and timed stepdowns at the same time. Customers on TLF and BLF would greatly appreciate to
have thermal regulation only.
- Please allow a user defined choice of ATR thresholds (e.g. 45°C, 55°C, 65°C) just like HaikeLite did with their
SC26…
Thermal protection setting can be accessed by 10 clicks:
The light flashes once => turn it off to select 50 degree step-down temperature
The light flashes twice => turn it off to select 60 degree step-down temperature
The light flashed 3 times => turn it off to select 70 degree step-down temperature
Important: Please set 50°C to default by factory to make sure that customer complaints about too much heat are as
low as possible. Barry recently talked about it on TLF. With 50°C as default this problem should be solved. More
experienced flashlight users or people who want to unleash the full potential can raise the threshold to 60°C or 70°C.
There is no disadvantage with this new feature but Sofirn will make their flashlights even more powerful and more
successful.
Work and production cost are often not the issue, convincing a manufacturer that a change is an improvement and profitable is the big hurdle. And Sofirn, and also Simon from Convoy Flashlights, get loads of suggestions coming from BLF-members, and that is a mixture of good ideas and mediocre to bad ideas, so they have to sift through the lot as well to find the good ones that are an improvement and/or will increase the profit.
I see. Someone could still make this a BLF edition group-buy thing. I assume we all see the reasonable changes here, or am I completely wrong?
No, you are right, some changes seem 100% a good idea. But it so appears that what we flashoholics as a group see as reasonable changes is not just as obvious for the chinese manufacturers, 1) because they sometimes have less insight in how a flashlight should be, 2) because they know things about manufacturing that we do not know, and 3) because their audience and profit comes from a wider group than just flashlight enthousiasts from BLF, and for muggles some changes are rightout a bad idea.
I agree with you Jos. This recognition might be the result we now see with Sofirn's SP36S which basically is a simplified SP36 BLF Andúril edition, coming with a less complex user interface and a more conservative thermal management (2min timer, 55°C ATR). And that is also the reason why I have proposed a thermal regulation to Sofirn that is fair to all sides and addresses both requirements for enthusiasts and apprehensions of muggles. Being more flexible with user-defined thresholds flashoholics will be able to unleash the full power whereas - on default - muggles can safely operate the light with moderate settings.
Ordered a SD05 and put my trusty protected Trustfire 18650 battery in. I really like the form factor, the build and the magnetic ring, but i’ve got a problem:
It does work on low mode and middle mode, but as soon as I turn on high the lamp turns most of the time (not always!) almost immediately off. I have to anscrew the tailcap and screw it back on and then it starts over again.
Is my battery showing it’s age (5 years now), do 18650 not fit properly or is it a problem with the torch?
I’d suspect the battery.
Battery, especially if it’s protected and high-mode just draws too much current. That, or it’s just old and its too-high internal resistance causes too much voltage-sag and the light cuts out under lvp.
Some lights you can get away with laptop-pulls and other rejects, others nope.
There may be a problem with the protected battery. The high current consumption is 5.7 amps. Protection disconnects the battery. I also have SD05 and I measured the current draw.
Get a 21700 battery from https://eu.nkon.nl/ or at least an 18650 with a 10A continuous discharge rating. The 5.7A load is tripping the protection and the cell probably can’t handle the load either, Trustfire always overstated their cells capabilities one way or another (at least they are not Ultrafire).
I measured the current with the Sofirn 21700 battery that I bought with the flashlight. The battery was fully charged to 4.2 volts.
The come-with battery works (wurks?) quite nicely. You got the light-only, not the kit? Tsk…
Yep, just the light. Delivering to Germany you have to pay tax and customs for everything over round-a-about 26 EUR so as a kit the torch was a lot more expensive. I already ordered a Sofirn 21700 battery separately but it hasn’t arrived yet.
But it seems to be the old trustfire battery, so i can calm down. 
This light will not allow current over 7.1A so you don't have to use a protected cell.
This is an awesome light the perfect size and i think its dang near as bright as both of my Sofirn C8F’s and my sp33 , by the way my ring does not rattle at all.
^THIS The most important feature of a dive light. The Sofirn is inexpensive, so it it works for quite some time before the stuff rusts out……I don’t think you get high quality from China at that price. Jus sayin…mines inbound as we speak.
Sharks Bay, Egypt
Daytime shot, depth - 10-12 m
An actual dive shot, nice! Looks like fun.