Sofirn C8F host. 21700 C8F Available

Thanks Zozz, my SKY RC3000 measured 24 mOhms.

This is my result (lowest IR achieved after rotating the batteries and pressing the batt-IR check several times)

Another thing I love about my Sofirn C8F 21700 is that it can run the cheap Tuofeng 18650 2600 mAh and still be very bright. The brightness with the Tuofeng batteries still reminds me of the Olight SR90 in terms of lighting up a room brightness.

Sofirn is number one for me. :money_mouth_face: Solid budgetlight. Above and beyond. :+1:

I had a chance to compare the Sanyo UR18650NSX 2600mAh against the LG MJ1 3500 mAh. The runtime is definitely solidly longer with the LG. This means that if I want long runtime at a good brightness level in my Sofirn C8F 21700 torch, I should purchase the Samsung 50E 5000 mAh battery which is currently $9.95 from Battery Junction or $9.99 from IMR Batteries.

Hope this observation helps.

Ah, it’s good to see the 50E is now being sold at more places. Other good high capacity 21700 are LG M50 and Samsung 48G (the 50E is designed to replace the 48G).

Thank you for making me feel like part of the group. Flashlight prices are out of control. Back in 2011, you could pay $334 to Amazon and have a pristine Olight SR90 in top quality casing delivered to your door guaranteed. The thing was 2200 lumens and most importantly over 100k cd throw, with long sustained runtime because of the 8 X 18650.

Sofirn is the only cutting edge LED torch technology that I can afford. I don’t think I could pay more than $300 and change for the biggest and baddest but that is what they are nowadays $500+. Plus they are not sold on Amazon, but Sofirn is sold on Amazon. God bless Sofirn. Thank God for BLF.

I would say flashlight prices are falling left and right. New leds and new batteries are giving better performance for a fraction of the price compared to a few years ago.

The BLF GT is 1800 lumen and 1,200,000 cd throw and sold for either $120 or $160 depending on the group buy.

The GT70 is like 7500 lumen and about 600kcd and $220. Both are 8 x 18650.

:slight_smile: :beer::slight_smile:

That’s a nice thought Jason, brace yourself for the new wave of technology and it’s inflated price margin… :wink:

If it’s worth it, people will buy it. If not, it will sit in a warehouse.

Give me an example of what your talking about. Do you mean the laser excited phosphor mini throwers or something else?

Thanks for bringing the BLF GT70 to my attention. I may take a risk and try it out, based on the numbers on paper and design. In the meantime, I will keep using my Sofirn C8F 21700. :beer:

Here is another light from Sofirn you may be it interested in, the SP70. Check the pictures on the last page for the latest info. Hopefully it will be available soon. It is like a smaller version of the GT70 and will be very affordable.

Yes I am interested. +1 :+1:

I finally recieved my 21700 C8F. The shipping took a lot longer than normal.

Driver and switch pics plus performance data is all here.

I notice the brightness climb as well.

I’ll have to compare the top of ramp with the dbl click.

I get the same output for both.

I tested the low voltage indicator and protection of the C8F 21700.
The side switch lights for 5seconds when turn on the light or made any press like mode switching.
It glows green when battery is above 3,4V.
It blinks red when battery is from 3,1V to 3,4V.
It blinks red fast when battery is under 3,1V.
The light shuts off at 2,6V.

The indicator also start to glow when battery draining to another indication level.

Repetitively I get a bit different results, but the difference is not big and it’s about 3%

Thanks for testing.

So there is no orange, just green and red, right?

Once the battery is below 3.4v the battery indicator stays blinking beyond 5 seconds, right?

This seems like a pretty nice design.

If it under 3,4v it blinks red for 5 sec without any action needed. And again turn off the switch indicator until switch pressed.

I got my light today. Brightness climb is totally out of control on mine.

Starts out at about 1000lm, then climbs to 1634 over the period of about a minute. Highest reading I could get.

Added 18 gauge leads from the driver to the mcpcb, and swapped the mosfet for an SIR800…

3,904 at startup with the sofirn battery.