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

It would depend on the heatsinking solution though. Copper heatpipes for more efficient transfer of heat away from the LED, and more fins/surface area to dissipate that heat would theoretically mean a higher stable output than a solid chunk of copper with a small number of thick fins.

I wonder about using a design like the NoFan CR-95C CPU heatsink as a flashlight head. Flip the orientation of the CPU block, add gaps for the electrical, mount the MCPCB, LED, and reflector on the inside. Then add structural support with horizontal aluminum fins and aluminum posts. Waterproof or economical? Not in the slightest. The cooling potential should be excellent, though. Some napkin math says a single XHP70.2 cooled in such a manner (assuming some airflow and quality direct thermal path MCPCB) could theoretically sustain more than Caleb’s mentioned 5k lumens.

More practically, I doubt copper heatpipes would be economical, and thin aluminum fins flatly wouldn’t be sturdy enough. Maybe a vertical orientation of medium thickness, more densely packed fins, curved to provide better airflow when the flashlight is held parallel to the ground, attached to a copper heatsink would be an effective next step? It would be a unique look, at least.

Has the Sofirn K6 project been abandoned or left in stand-by? :zipper_mouth_face:

The light that basically looks like the Q8?

They have been talking about it, but not by that name. Sofirn has access to the Thorfire Q8 parts and have been selling replacement drivers, switches and mcpcb’s. They want to do their own version of it. Maybe even use battery carriers and double up on the length. You can check it out here.

BTW, I see they do currently make a Skyray King clone called the SF34. I don’t think it shares any parts with the Q8, though.

Yup, Jason, that was the light! I somehow missed that post, by that times I was away from the country and saw the forum less frequently! :zipper_mouth_face:
Thanks for pointing it out, gonna read that thread :+1:

Assuming 3x70.2 LEDs, wouldn’t each LED be operating in a more efficient range thereby generating less heat?

I’m not sure why your assuming 3 emitters since Sofirn wants 1. Anyway, I will use the L6 as an example as I’m more familiar with it. When it comes to heat generation, it’s directly connected to how many watts of power we are generating. The stock L6 pulls about 4.7A at the tail cap and that is basically too much to be sustainable and not burn you. Let’s say the voltage sag of two good batteries gives 8v. So 4.7 x 8 = 38 watts.

A single xhp70.2 would need to draw about 9A to generate 5,000 lumen. Let’s make the voltage sag a bit more and say 7.8v x 9A = 70 watts. That’s way too hot.

Now to get 5,000 lumen with 3 x 70.2 we would need about 6.6A. Let’s say the voltage sag is 7.9v x 6.6 = 52 watts. It can not sustain that. It will have to activate thermal protection and drop down in power.

I would estimate that we need about 30 watts (about 3.7A) to be both sustainable and to not burn your hand. 3.7A with a single emitter is about 2250 lumen. 3.7A with a triple emitter setup is about 2800 lumen.

So even though a triple 70.2 setup is more efficient, there is no way it can sustain 52 watts.

Currently there are only a couple of lights that can sustain 5,000 lumen. One of them is the Acebeam X65. You can get an idea of its size and heat sinking fins here.

It is really big! Much bigger than the light Sofirn wants to build.

Hmmmm…… I think THAT ONE … is already taken. :smiley: :smiley: :smiley:

Stick with the original K70 theme with slightly larger head 1 emitter and a bit more power and keep the price budget.

Yep, well said ‘edsg’… :+1: . If we’re not careful this could get all BLF’d up. :person_facepalming: . :smiley: :smiley: :smiley:

Yes, they do not want to invent a totally new design. We should keep it along the L6/S70s theme.

Does anyone have the new SP32A v2.0 light? Do you like the ramping mode on it? I hear it’s pretty good compared to v1.0.

What do you guys think of using the C8F UI?

I think combining the 4 modes of the C8F plus the ramping on the other light would give a ton a choices for users. (Assuming they can combine all 5 modes)

Sofirn says they do like the idea of one click on/off (instead of press and hold for off), so I hope they can do that. Do you guys agree?

I’m a huge fan of NarsilM personally. Q8, BLF GT, TA modded MT09R…

I’m not familiar with the C8F UI, but I’d like ramping to 50%, double click to turbo.

I agree. :+1: … The 21700 / 20700 may or may not be the future… that remains to be see as far as we are concerned in the ‘torch’ world.

But for now & the foreseeable future in the world of lights…. the 18650 is far more popular than the 26650 which is far more popular than the 21700. That is neither good or bad… it is just how it is…

  • So if it is to be quad batteries… keep it 18650.
  • If it is to be triple batteries…… keep it 18650.
  • If it is to be two batteries in series… make it 26650.

And please SOFIRN……

…….Keep up what seems to be your tradition of offering ’True Neutral White’ emitters instead of ‘Urine Yellow or Harsh Blue’.

It seems you have many offerings in the 5000K - 5700K range…… ’True Neutral White’ that adds little tint one way or the other.

THANK YOU & KEEP UP THE GOOD WORK!!! :+1:

Sofrin agreed to keep the K70 rolling the K70 is a modded S70/L6. Its NOT a sodacan light, Its NOT a triple XHP70 monster. Slight changed are okay but i dont think this thread is intended as a whole new build?

The K70 was meant to be a functional simple versatile light at a decent price. 50USD was a similiar price to what the Q8 cost and the K70 would of had similiar output or even more output then the Q8 stock.

My S70/L6 see some use while my MT03 is just covered in dust because that style does not suit what is needed when outdoors.

You could even mount a S70 on a rifle if you wanted to because it has the skinnier battery tube and the beam profile is well suited to actual real world use.

Plus running 2 26650s in series is as much W/H as running 4 18650s that is why this style works.

Looks like you jumped in the deep end Jason :stuck_out_tongue: lol.

!

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I like the 2x26650 platform. Along with the L6 size head. (Althought 3 XHP70’s would be awesome!

I’m always about max output, so is a single XHP70.2 feasible?

Well said everydaysurvivalgear. :+1: … Sounds good also. Two 26650’s in series is pretty darn nice too. :wink:

From what I understand, Sofirn would like to use their own driver design and UI instead of a whole new driver to run NarsilM. (Not that they are ruling that out)

Using their own driver and UI helps keep costs down.

They would like to use their new v2.0 ramping mode (maybe even a more refined version), plus 1 or more regular mode groups. I’ll let you know if the give more details on the UI and it’s modes. More than likely it will be a mix of the UI on the SP32A v2.0 and the C8F. I listed both UI’s below.

Here is the ramping mode instructions from their SP32A v2.0. See what you think. Looks pretty good to me. Especially if they tweak it to make it smoother like Narsil.

Group 2: Ramping (takes about 4 seconds)

When the light is in Group 1 (distinct brightness levels), press&hold switch for 3 seconds, it switches to Ramping, the default brightness is xxx lumen (Medium Mode).

When the light is in Group 2 (ramping), Fast click to turn on or turn off (Nice!)

Press&hold the side switch to ramp up and down. It changes direction when ramping again within 1.5 sec; same direction when ramping again after 1.5 sec.

The light flashes two times when it reaches Eco or High.

Double clicks to activate Turbo, one click goes back to the last brightness.

Triple clicks to Strobe, one click goes back to the last brightness.

When the light is OFF, press&hold for 3 seconds, it flashes 2 times and then switches back to Group 1.

Here are the 4 mode groups they use on the C8F. Remember to ignore the actual lumens, just see the level spacing.

• Group 1: Low 2 (85 lm) > Medium (650 lm) > High 2 (1330 lm)

• Group 2: Low 1 (37 lm) > Low 2 (150 lm) > Medium (790 lm) > High 2 (1330 lm)

• Group 3: Low 1 (22 lm) > Low 2 (80 lm) > Medium (630 lm) > High 1 (990 lm) > High 2 (1540 lm)

• Group 4 (muggle/kids group): Low 1 (20 lm) >Low 2 (70 lm) > Medium (150 lm)

The original group is group 1 and it always cycles from low to high.

1) Fast click for ON and hold 0.5 seconds to turn OFF (This can probably be changed to: fast click for on and off)

2) Memory function: From OFF, hold 0.5 seconds to go to the previous used mode (sounds odd to me)

3) In any mode, including OFF, hold 1 second to go to moonlight (1 lm)

4) In any mode (except lock-out and kids group), double-click to go to turbo (2580 lm), one click to go to the previous mode.

5) To lock-out the light, from OFF, click 4 times rapidly, the light blinks twice to lock-out; click 4 times rapidly, the light blinks twice to unlock.

6) Battery level indicator: Click 3 times rapidly to go to battery level indicator. At 50% - 100, 4 blinks to confirm; At 30 - 50, 3 blinks to confirm; At 15 - 30, 2 blinks to confirm; At 0 - 15%, 1 blink to confirm. The light finishes blinking, goes to the normal lighting.

7) Low battery indicator: 3 blinks when the battery level is lower than 30% will then go to previous lighting; blinks lasting for 1 minute when voltage lower than 2.8 volts will then go to turn off.

No comments on a UI?

This is what I have suggested:

2 mode groups (only 2 groups is their idea. They might be limited in storage space for coding).

Group 1: 5 brightness levels.
Single click to turn on/off, press and hold to choose mode low-med-high-low-med-high cycle.
Moonlight and turbo hidden. Turbo is a dbl clk. Moon is press and hold for 1 second from off.

To switch mode groups, something like 6 fast clicks or press and hold for 3 to 5 seconds from off. Something a bit unusual so you don’t accidentally switch groups, but easy enough to remember.

Group 2: Ramping.
Click to turn on/off, press and hold for ramping. Changes direction similar to Narsil. Dbl clk to turbo. Moon is press and hold for 1 second from off then click to turn off.

Does the above sound okay?

I don’t know if strobes are necessary since they are not on the C8F. They can probably be added and activated with a triple click. (I never use strobes)

Is there a need for electronic lock out or is mechanical lockout prefered? (I always go for mechanical)

It’s important to get a good UI into place as they may use this on other future lights.

The ramping mode with extra standard modes sounds good its got every thing we need with out being overall complicated.

So if this light has a tail cap any way they can program a standby mode into the side switch? This will give us the best option for one handed operation. I think the S70 has a standby mode ill have to check mine.

Have they mentioned a price or do they want a parts list?

Hey Chris, how’s it going. I’m glad somebody likes this.

All lights have a tail cap, maybe you mean tail switch?
This UI will be usable on either style. A single click of the side switch is on/off. If a light using this UI happens to have a tail switch, then that will just be for mechanical lockout. You don’t control the UI from a mechanical tail switch.

No prices have been mentioned, but I assume they want to keep prices in line with the competition or maybe better it. I think if they can come up with a better product (updated emitter, SMO reflector, better UI, maybe higher output) at the same price as the competition, it will be a winner. Even if it costs a bit more, you won’t have to swap a bunch of stuff to upgrade it so you still come out ahead.

I can say for sure they will not want to use heatpipes and stuff that would just raise the price and add complications.