The change of threads mostly happens at the head to fix some O-ring problem with the Sofirn Q8, so yes, they will probably introduce 2 tube variants.
I'm not sure if I got this right: Two new tubes for the BLF Q8 head? I assume they just meant to say they are making two new tubes for BLF Q8 AND Sofirn Q8, i.e. one new tube for the Thorfire "BLF" version and one new tube for the Sofirn version. Is that correct?
I want a BLF Q8 extended 8×18650 tube (x1).
Lux-Perpetua +3
SebaZ74 +1
Unloco +1
@Lux-Perpetua, that basically means the 1st tube that threads onto the head on the BLF Q8 is different than the one on the Sofirn Q8.
interested in BLF Q8 tube
TheBigLEDowski +1
I’m sorry but I still do not understand, I have to modify my Blf Q8 before I buy the tube? if not, there will be a lot more lm? and how will it be with the length of the turbo mode? Thanks.
@SebaZ74, you will only have the buy the BLF Q8 version of the tube to make it work.
If you have not bypassed the springs, you will be getting more lumens since the resistance will be 1/2, and the current to the LEDs will increase, and there will be more brightness.
High turbo brightness runtime will be increased by about 1,5-2x depending on what 18650s you use.
Will it be possible to buy it later in their store on Ali?
Uhh, yes obviously.
Where otherwise would they sell it ? 
In fer 1. Price dependent.
Dirt +1
BlueswordM you going to keep the interest list in this thread or make another one?
You take off the stock battery tube and put it in the closet. Then buy two new tubes and two carriers. Then you can use 8 batteries in it.
Correct BSM?
A single blast of turbo should last about the same amount of time as it does now, or maybe a bit less, before the thermal protection reduces output. It might be a bit brighter, but not much.
Total run time basically doubles when you double the number of batteries.
1. Yes. Put it in the closet.
2. Yes, same turbo runtime, but if you can keep the light cool, you will get at least 50% more runtime.
3. Not exactly with a FET light. Since you basically halve the resistance of your battery setup, that means the light will be capable of pulling more power, and therefore, less max power runtime on unregulated mode.
Bonus points: With an extension tube, you can now get the same power output as with 4x20A cells with 8x10A cells, meaning you can use higher capacity cells like the NCR18650GA and Samsung 35E/36G to get 10-15% more capacity on average, which is non-negligible.
If you keep the light cool you can more than double turbo run time, even using 4 batteries. It’s hard to keep it cool, though.
You don’t really halve the resistance of the batteries by using 2 carriers. Texas_Ace saw this when using two carriers in the GT. You add a little resistance back into the circuit from the contacts between the carriers as well as having more battery springs.
So you get less resistance overall, but it’s not exactly cut in half.
We still need to see how good the contacts are between the carriers.
So please, tell me what are the real benefits of the 8x18650 configuration compared to 4x18650?
Longer run times and ease of converting voltage to 6v or 12v for custom emitters.
- extended runtime
- it looks extreme, especially with even more extensions added
- if you are a modder, the battery carrier situation makes it somewhat easier to convert the Q8 for 6V leds (together with a different driver)
The output will not change dramatically with 8x18650.
You could have started and ended with this one, you sold me on it with the one line lol