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


(I used to play Doom.)

Just a note to Sofirn: Although this isn’t related to the SP20, DBSAR is definitely the person to contact about the BLF Lantern project:

It’s based on the BLF Q8, and if I understand correctly, Sofirn makes the parts for that? So it might be a good option to get Sofirn involved in the lantern project.

I liked the K70 project because it was going to be a beefed up/heavy duty light with a great ergonomic form factor:

The XHP 70 produced a lot of lumens out the front.

The larger head allows for a very usable mix of flood and throw.

The 26650 battery tube just seems to fit well in my hand and gives good run times.

So let’s take these strengths to the next level:

3 x XHP 70.2 or 50.2 (like a larger C8F)

3 x 26650 battery tube, thick wall, heavy knurling, extended run times

Oversized heat sink, wide spacing between fins for better airflow/heat dissipation.

I think this would be a winner!

I’ll vote for that. Have a regulated high mode that should be indefinitely sustainable heat wise, with turbo only accessible through double-click.

Maybe offer it as a 2 cell tube, since not many chargers will accommodate more than 2x 26650 afaik. Or am I wrong about that?

I am also for of 3x 26650.
And one (side) switch only.
Triple XHP70 or MT-G2 + XHP35 HI. Something similar to MF03.

How about BlueSwordM springs?

thanks for the interest in the BLF users Sofirn

Wow, that would be big and long light.

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

Let’s start with a price point, and let’s pick one appropriate to the BUDGET Light Forum.

The Kronos K70 was last looking at a group buy price of $50. I think that’s a good number to target. If we look at the Q8 as a model, MSRP would be, what, $75 or so?

Beyond that, a few thoughts.

1. Perhaps branch out into something other than CREE emitters.
2. Something 80+ CRI that doesn’t have a puss-green cast (ie, not Cree).
3. A driver running a derivative of a nice BLF firmware.
4. A driver using an AVR family chip to make flashing new firmware easy.
5. Largish driver cavity to allow higher power driver retrofits without needing to cram a 40-60w switcher in 17mm x10mm

In terms of general form-factor, picking up where the Kronos K70 left off is a fine direction to take.
I’ll also suggest a different direction. Either a hot-rodded SP33 or a hot-rodded SP33-sibling based on the 21700 battery form factor. Monster single emitter, or a triple or quad with something more modest.

If this is the direction, I’d like to see a groupbuy price point of >$40, MSRP of, maybe, $50.

Whatever it is, don’t make this mistake!

If you want something different than the Kronos k70 type light:

What about a soda can style triple 21700 in series, single xhp70 with a high power buck driver?

Since it is the first 2 day 26650 the range of the power supply then it should be within the scope of the ideal, if using a CREE XHP70.2 have 4500 lm is a long range, but also I want to have at least 800 meters that is just good. In addition, I expect it to have a low brightness light at its tail for emergency use, which can be easily found in the dark

Sounds great to me! But I don’t know how 26650 and 21700 will be manageable in the same battery tube even with adapters. 21700 cells will have a length of at least 70mm each. Those 26650 cells have a shorter length of approx. 65mm and may need magnets or soldered buttons on their pole to fit in a tube designed for 2x 21700. That means one needs to calculate a spring deflection of additional 10mm (5mm per cell) apart from the usual compression of the springs when inserting batteries into the tube.

It would be great if there were interchangeable flashlight heads for individual illumination needs:

  • one deep SMO reflector with XHP70.2 (comparable to the Convoy L6)
  • a triple SMO reflector with 3x XHP35 Hi (comparable to the C8F but bigger)
  • a flood optic array of carclo lenses like the Meteor M43 uses, e.g. 3x 10507 Carclo lenses each with 3 XP-L2 or LH351D emitter

So, in the end one could choose of three different flashlights with only one battery tube needed. Development costs might be a bit lower if all versions use the same battery tube. Constant output is something a lot of flash’oholics would appreciate, i.e. a very efficient boost driver or buck driver would be great even though costs may rise a bit. Moreover, ramping as e.g. in NarsilM will be a great advantage over fixed modes.

Let me throw in a suggestion as well. How about a design similar to Thrunite TN40S? 4x XHP35 HI, large head with 4 reflectors, running of 4x18650 with great heatsinking and UI, backlit metal side switch only. High output thrower with a lot of usable spill.

I wish Sofirn would develop a nice alternative allround thrower like the Acebeam X65 for a reasonable price:

  • 5x XHP35 Hi Quintuple Reflector
  • 8.000 - 12.000 lumens, depending on LED binning and current regulation
  • 8x 18650 or 6x 21700 (no built-in battery pack!)
  • Optional short tube (4x 18650 or 3x 21700)
  • Ramping OS like NarsilM, Andùril, etc.

I’m really curious if such a flashlight would be feasable for far less than $ 450,00 with the big advantage not being dependent on an expensive proprietary battery pack like with an Acebeam X65. Such a light would be far more interesting to me than any Acebeam X70 or Olight X9R.

So far, there is nothing that really compares to the Acebeam X65 when both flood and throw are combined in a best way, except for the Fenix RC40 maybe. So, there is a good chance to fill a gap in the market. If such a flashlight became available for $ 150 - $ 250 it certainly would find a lot of prospective buyers.

Triple 21700 is less space-efficient than quad 18650.

Use xhp35 and make a real budget thrower. I’m sure I’m not alone in wanting an affordable long range light.

The recent blf GT and mf04 are far from budget.

I would also welcome a pimped-out, budget friendlier alternative to Acebeam K65 or Mateminco MT70 type of lights. Large, 8-9cm almost smooth reflector, hard driven single XHP70.2 with great tint. Metal side switch only, 4x18650 tube, with alternative extension tube for 8x18650. Good heatsinking and quality boosting driver to let batteries drain almost flat. Great configurable UI.

THIS. I believe that many of us like long range, HIGH OUTPUT lights, thats why i suggested XHP70.2. The GT and MF04 are not only too expensive, but for many they are too big for practical use.

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.