Sofirn SP70 Alone $50, PM for AMZ US CODE(LIMITED)

It does look like it suffers from your reflector pet peeves. Thick bezel and you can see the entire edge of the reflector from the front. If that 90 is measured from the outside of the head it’s much less ID.

Everybody, Sofirn messaged me recently and they said that the springs are indeed gold plated dual BeCu springs. They also thanked me for the advice :slight_smile:

I wonder how this light will perform with 2x Samsung 40T or 2x Molicell P42. The power of these cells should yield in way better lumen/lux numbers, shouldn’t it?

Yea you should be able to get around 8k lumens with top cells.

For such large head hope to see 6x18650 3p2s in next version.

Awesome. I'd like to thank you as well :p

Well maximizing reflector ID is for max throw - a 70 LED and OP kind of kills that idea, but it does look like an oversized bezel, :FACEPALM:

Another good reason to like SS bezels - generally they are made thin to keep costs down, and also since they are stronger.

What’s gonna be the optimum cells to use for this light? Brand? etc?

Ahhh, looks to me like they are including 18650 adapter sleeves, not for 21700's. For 21700's, the tubes and spring would have to be set up properly to go between short 26650/18650'a and 21700's and that gets tricky because you double the variance. It's probably a boost regulated so not sure if high performance cells well get you much, accept possibly longer regulated output times.

Not much info, so dunno for sure, but this my my guess.

It’s a FET driver but until someone measures how much the springs compress and how much room there is idk how you could for sure recommend something. If they tested with 18650 button tops in series any high drain 26650 button top (non protected) should fit. For 21700’s to really work without over compressing I’m betting a solder blobbed flat top works best since you probably wont have much room to spare for true button tops. They are hard to find in 21700 anyways (non protected)

Its using a Fet on direct drive on the highest output Sofirn got almost 7000 lumens with okay cells from the SP70. I would personally just use 26650s makes the most sense its made to use 26650s they should give best performance and run times.

Ahh, ok - I got confused there, and missed something. Must have been earlier in this thread about the FET based driver.

Interesting if they got ~7000 lumens and list it at 5500 - wut? A manufacturer under spec a light? No....

I think the 5500 lumen figure is old when they where using standard non high drain cells.

I'm all discombobulated over the specs. Since I don't think Sofirn could do it, we need one post somewhere that summarizes the details. Looks like Lux-Perpetua has the inside contact, so maybe post #4 could be edited up to reflect the current status as we understand it?

Just an idea....Hhhmm, ok reading more on this, wow - the UI is very close to NarsilM/Anduril - I like it!

-> single click ON/OFF, press&hold to change modes/ramp, dbl click for turbo, 4 clicks for lockout. I like you can turn the light ON/OFF from the side switch, and not only the tail, but they call it being in STANDBY - wonder what the parasitic drain will be then.

Their reasoning was they made the specs according to what someone would expect if they bought the “kit” that included batteries. Their included batteries at the time happened to be pretty mediocre. Between possibly using better springs and possibly sourcing better batteries they may need to update that number to whatever it measures with the latest “kit”

Yea the specs are all over the place. The only major change we had was for the slight OP reflector instead of the SMO. Maybe they will still make a SMO who knows.

Also i dont know if they have confirmed what LED bin/tint they are using we had some talk about it.

I would like to see a group buy started with a discounted price for BLF members. I think we could get a few hundred members on board.

Sofirn’s 4000mah 21700 flat top cells fit, but just barely. The springs are fully compressed. So they are not officially recommending them. I imagine some brands will fit and some won’t.

From post 1199.

I insisted on these points as I find them important.

We have not found out the parasitic drain. No one outside of Sofirn has tested the light yet. I can only hope it’s low. The S70S was quite high, but at least there is the tail switch to cut all power when storing it.

Wow, this turned to be a real BLF special, not just a slightly better S70S, as the original K70 was intended. I'm very impressed how Sofirn listened to us on this one. I know it's taken time, but look'n at the performance and UI, seems like a winner, best 2 26650 cell stock light out there.

Details I'd be concerned about are PWM rates, parasitic drain, efficiency, etc. If this is a somewhat new FET design, not sure if they have lower output secondary channels, etc., like we do in our BLF drivers. Not sure if anyone knows this stuff yet, or again, I'm just missing it.