Are those problems you speak of common to all of the newer generation Cree emitters, Jensen567? If so, failures with XP-L2s and XHP70.2s should also be common, I think.
Let's tell Cree we love bond wires and clear domes. :-D
Cheers ^:)
The dome is clear, just looks yellow from the top. No, seems to be isolated to the XP-G3 size die, I haven’t had a single XP-L2 or XHP70.2 fail like that.
I used it only for about 5 minutes, it was day and no point in using it longer.
And I used call that can’t give more than 3,5A because I had that near me.
Later i put HG2 inside and it died.
Bezel has even longer threads than original because I can screw it down completely with original o-ring. I used thicker one because I wanted even more pressure on MCPCB.
That’s exactly what’s wrong with mine.
1 works good and 2 dim or good when pressed.
Yeah, I’m not entirely sure what is causing it, but it seems to be fairly common with the XP-G3 and XHP50.2.
The fact that I have seen the exact same behavior from both of those leads me to believe there is some sort of manufacturing flaw with this die that has gone unnoticed by quality control at Cree.
Since they sometimes recover with pressure, my first guess would be something to do with bonding the flip-chip die to the external package.
Thankfully it seems isolated to only those 2 models, as the XP-L2s and XHP70.2s I have used are all going strong, even with some serious abuse in a few of them.
I own heaps of XPG3s never had this issue. I think i own 10 XPG3 emitters they all still work fine even after being driven really hard. What boards are your XPG3s on?
Various, but all DTP and mostly noctigons. I have probably more than 30 of these emitters I have used in various builds for myself and others, in that process I have had 6 failures. I have had 3 XHP50.2s fail out of probably 12 or so I have used. That is a relatively small sample size, but they are at least from various batches. I have also seen quite a few posts from other users here with issues using these emitters.
The ones that do work can take a beating, but some just die even with a relatively light loading. These are purely my experiences, so YMMV.
Looks like, after all reported issues, Sofirn decided to remove C8F from their store…
They are going to release fixed version soon.
:person_facepalming: I still haven’t received the first, self destructing version 
The new updated version of the C8F will be released November 8th I was told by Sofirn.
My C8T is a killer, 80.000cd just after switching to AR lens. I will post a review,just couldn’t find time lately.
Unbelievably this light have same size hotspot from 5 meters like UT02 which have much bigger reflector. :+1:
Jarl! I am also to post a C8T review pretty soon, with a freshly loaded 30Q cell I've been able to measure just above 6A at the tailcap with a custom built shunt.
Candela figures… don't really know what to say. I've measured up to 102.4Kcd but of course my smartphone's luxmeter may not be very accurate.
Stepdown time is ≈3:25 in my early sample, measured up to 52.8°C at the head fins just after stepdown.
Medium mode, handled via a low power MOSFET, should be PWM free but I haven't tried to check it out, may someone suggest some tool like an Android app? Can be from any source. 
Cheers ^:)
I just sent a mail to visosystems and said that they should fix their flicker tester app for android.
Maybe it helps, you could always borrow someone’s iPhone and download the app to check the flicker.
Edit: Got an automatic mail back saying he’s not in office until Dec 3:d so better find someone who have a iPhone you could borrow…
Will the sorfin reflector fit on a Convoy c8?
C8F reflector won’t fit C8. It’s shorter.
Here is my review for C8T
The whole C8F thing is a different e-switch beast now, Tracy Wan agreed to send me a unit 4 days ago. Told her about its somewhat steep retail price. She told me it comes bundled with a high discharge cell, yet I can't find any claim in this regard in the selling page advertisement.
This is my published review of the C8T: Sofirn C8T premier review/test - Like!
Cheers ;-)
55$ no way ! I can grab 2 pcs Crelant V6CS with infinite brightness control for that price…
phew
I am glad that I got one for ~20$ 
a price between 30 and 35$ is what they should aim for.
the high discharge cell is not a reason to boost the price that much.
a 30Q is 5$ for end customers…