I only tried turbo stepdown yet on my 21700 version. It stabilizing at 54°C
Made a test on the next level under turbo. The next level after that is about 700 lumens so I think there is no stepdown from there.
Does anyone know if Sofirn will have the new C8F hosts without branding on offer? I saw that other C8s are available on their store aliexpress page without engravings and that would make that host much more appealing 
a few of us have already received the hosts and they did not have any branding on them. However, no promises in what you will receive.
Great news! Time to build my first torch then 
Remember that you need a driver that takes an e-switch. The e-switch in the Sofirn C8 host is mounted on a board and held in with a threaded retaining ring, it’s all installed when you get it with the wires sitting loose in the head. But you need a 21mm driver that takes an e-switch. They provide the copper MCPCB that mates up to the reflector, you’ll need to reflow emitter onto it… XP footprint.
And yes, my host is unbranded.
Yes, I did gather all that information, reflowing emiters onto the MCPCB would defo be quite challenging so it might not be stupid to ask someone for help with this later.
May I ask what drivers did you get for this build?
I apologize. At full 18650 1500Lm almost does not differ from the turbo, heating more than 800-1000Lm.
I built an Anduril driver with an ATTiny85 MCU and FET+1 set up, used a 17mm driver board from Wight, the A17Hybrid-S, and adapted it up to the 21mm opening.
Just got an update from Amazon US…it says it will be here Thurday…YAY
Being budget-minded, instead of purchasing a 3rd 21700 cell, I will use the 18650 I already have.
Yep, I’m glad I found this, I thought WTF is going on? :person_facepalming: The driver is a POS! The lumin output in all modes creeps up and the higher modes even more slowly, as do the amp readings. Took forever to get the highest amp/lumin readings? Best I got was 2440lm. at Turbo and 6.43amps, using a 30T with an 8awg jumper wire, not the cap. With the cap it was like 2100-2200lm. :cry:
But I bought it to tear it apart… so meh…Truly love the build quality, it is outstanding! :+1:
I got mine also…when u hit Turbo…it creeps up to turbo like the post above…im unsure the lumen measument.
Mine with the stock Sofirn battery made 3100 lumens. I also noticed that it is creeping up. And mine draws 8,5A
I ope Sofirn take a look at the drivers. I told them there are some issues.
Hmmmm…how do u check the amps?
Another light but you get the idea.
Thanks…but doesnt help me…no offence…but not good at this…lop…i just have mine set at Voltage…
Show a pic of your multimeter and I will tell how to set it and use very short leads.
Im insure how…never uploaded photo on here. Keeps asking for URL
Open an account at Imgur and post your pics there and link them