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

I like the 9cm smooth reflector with XHP70.2 idea! Great output and throw (7500 lumen, 320 kcd) but better handling than the BLF GT, only slightly larger than the K70. With 2x26650 in series a simple lineair driver can be used (XHP70.2 in 6V configuration) and high enough current achieved (8-9A). Modders can slice the dome and improve the throw to perhaps close to 600 kcd.

Why not give it a shave in factory?

Good point.

Wow settle down lads. We are going to scare them away lol. So many big ideas at once.

[quote=How about battery tube for 2* 26650 and coming 2 sleeves for 21700?
Same big head for two kinds reflector, one XHP70.2 or three XHP35 HI emitters[/quote]

One XHP70.2 and one XHP35 HI to keep the price low should be fine ,to make the tube fit both 26650/21700 just make a spacer to add the length and also make flat top 26650 can connect in serie.

+1 my vote

This sounds good to me.

Yeah, the MF03 never got off the ground, I was wanting that to be my first real monster light beyond the Q8. This would be an opportunity to leapfrog the market on that concept, perhaps with a more budget friendly version, 3x XHP70 but not all reflectors the same, and selectable between them or all 3 at once, to give flood, throw, general purpose beam, or all 3 at once for raw power, run on 26650 series tube instead of multi-cell carriers.

I’m sorry but what’s your point?

21700 will be the future. Why go back to 18650? There are already enough 18650 lights available.

21700 will be the future. But so will be 18650. It’s not going anywhere, there are no signs of it becoming obsolete.
Quads use less empty space in a circle than triples do, so they are more space-efficient in general.
I actually did some calculations of it, but I have lost the spreadsheet. Anyway the result was that quad 18650 simply offers more mAh/mm³ than triple 21700. And that’s my point.

What about 3x21700 in series instead of 4x18650? I wonder if that would make the battery tube slightly smaller in diameter for a more easy carry? As it stands I think tubes that hold 4x18650 are slightly too large to be considered comfortable to hold.

1x26650 tubes are very comfortable to hold, and I find 1x18650 tubes slightly too small to hold.

A Ring of xhp70.2 like acebeam XT80 and Direct drive all the LEDs :disguised_face: :smiling_imp:

Triple 21700 is thicker than quad 18650.
If you want thinner than quad 18650 and thicker than single 26650, consider triple 18650 and single 32650.

As far as I know, there are no really good 32650 cells in production, so I would also prefer 3×18650 flashlights.
It is a very handy format, and I think, Sofirn could develop awesome models of it.

My detailed proposal (I could not determine, in what extent I am off topic, but I need to spread words ;) ) for one possible model:
3×18650 in parallel configuration
3 separate XP (3535) footprint emitter on d=16mm copper boards each (high CRI emitters would be welcomed - LH351D !)
one separate TIR optics per emitter (essential part!)
spacers and bezel should be designed for super easy optics swapping
efficient mass and some fins for heat spreading
don't have to be super bright, but around 2-2.5A sustainable current per emitter would be good (I am not expert at the driver part)

And...
please take a look at optics chosen by me, here (all have sizes d1=20mm d2=18mm, h=12.8mm):
Clean/smooth optics
Frosted optics
Bead optics

Once this would become alive, I think, it should be super awesome - and this wouldn't be something extraordinarily bright and heavy, just very practical.
(I think, it would weigh around 280-350 g without batteries.)

Btw, I had some of these optics installed already in one of my lights, and had very interesting results.

With everything in parallel and separate it sounds like you just want 3 tube lights welded together and controlled by a single switch.

After some thinking I like that idea a lot, though I would do it with a factory-shaved dome and quad 18650.

I wonder what current did you really mean…
because 8-9A 6V won’t deliver 7500 lm even on the LED. 8-9A 12V would, but that’s quite a lot….7-8 would be more like it.

High power and high CRI with a focus on good tint would be nice. Being able to swap the head for flood/throw and the tube for different size cells would be pretty sweet too. Add a special anodizing colour option like dark blue or bright green, with tubes/heads to match.

Basically yes, but two main reasons would be:

  • triple and quad optics are manufactured with very few possible beam patterns (mostly one or two), and if you look up the optics, which I have linked, they offer way much better beam shape customization (regarding hotspot size, hotspot to spill transition, spill brightness - I can include my observations, if you are interested) - which would really shine, when it would be used in the 2000-3500 lumen range.
  • because of the 3535 format, anybody could source his own preferred emitters - even attempting to mix tints

Considering how popular the BLF Q8 form was, sticking with 4x18650 batteries and an XHP70.2 LED would make for a very nice light. 4 cells in series matches the 12v needed for the LED (with a buck or linear driver), much better than a 3-cell version would.

Just a single XHP70.2 would probably be enough, and be well matched to what the light could maintain without overheating.

You could distinguish the light from the Q8 by including a diffuser cone to make it a nice optional lantern.

I know a lot of people here want to see the 21700 and 20700 cells being used, but IMO we all have a lot of 18650 cells already and I’m not ready to make that jump quite yet. I’m not convinced they’re a better cell than the 18650, especially in multi-cell configurations (due to heat, spacing, and energy density).

The 2S 28650 will offer more natural in the hand not too fat like 4x18650 also the classic look of old Maglite and the good cell like Lii-500 or Shockli 5500 is cheap and provide decent current/capacity. Today we have plenty of 4x18650 light to buy in the market but not many good 2x28650 the L6/S70s were couple years old and not powerful enough for 2018 …that my idea.