I took some beamshots
Iāve never seen a bare 12v or 6v mcpcbā¦ based on the picture above, what indicates visually that it is either 12v or 6v ? I have a flashlight in either one of those and Iād like to examine it.
Some are configurable like (at least older) Sinkpads. But a 6V will look like a normal mcpcb with āthree-stripeā pads. The 12V will have a āsā shaped pad where the Anode and Cathode are split and half are connected to the thermal pad. Pic from Djozz on the first pageā¦ Alibaba GT-FC40 tested (a 5000K 95CRI 12V domeless XHP70 replacement, supplied by rngwn) - #15 by djozz
thanx a lot. dont think itnis that interesting. jist.beacuse of some more throw...such worse power efficiency is deal killer for me
Thanks Mocarny for your beamshots, and thanks for rngwn for getting attention for this LED. This is truly a great LED to use in a Convoy L6.
I am a huge MTG-02 fan, but this one has converted me! The output of the 4500k in the S11 is so creamy that it is almost dreamy. It also has a much better hot spot since it has no dome.
Exactly! I feel all of my MT-G2 flashlights obsolete now (3 pieces of Haikelite SC-02).
I have a Convoy M21C with GT-FC40 5000k and the tint is perfect, and CRI is excellent. Review is here
I am think of converting my Haikeliteās but I am not sure if they are 12V on not, have not torn into them that farā¦ Did the MT-G2 only come in 12Vā¦ I think so! I still do love the old workhorsesā¦ I did make a P60 drop in once with a 4000k MT-G2 and loved itā¦ will have to dig it out again as well.
Darn it, memory returningā¦ the MT-G2 was 6vā¦. 
Thanks for this. Now I just need to find a BLF GT70 mpcb and I can reflow and upgrade my BLF GT!
I made some color test lighting set of thinks with different light sources:
- Sun light in room with neutral color walls and ceiling.
- SST40 5000k LED in convoy flashlight. Battery current (LED has consume same) was around 2A.
- SST20 4000K LED in convoy flashlight. Battery current (LED has consume same) was 1.75A.
- LH351D 4000K LED in sofirn HS05 flashlight. Battery current (LED has consume same) was around 2.3A.
- GT-FC40 4000-4500K LED in convoy S11. Battery current (LED current is unknown) was around 3.2A.
White balance was automatic. There is next post with WB fixed to day light.
All flashlights have different light beams.
So try to not notice to light level, shadows, color temperature.
Just notice to color differentiation into each scene. Are the colors distinguishable?
Red and brown are definitely off on sst40. FC40 looks less yellow than the others.
Sorry for some mistake. I took photos in auto white balance mode. Fortunately I took them in RAW and there is new set of photos with day light WB.
Iāve just read a review on Reddit of the Acebeam E70 CRI with the GT-FC40 but canāt see it on Acebeamās website.
It is the option that says āCRI95+ 4500k 2800lumensā.
Hi djozz. It is possible to share file or table with your measurements. I want to try to make pcspice model of FC40.
This is an oldie, but I'm a rebel like that. ;)
That SST40 looks fantastic, I'm quite surprised. 5000k is definitely where it's at (k temp rating of the sun, so....)
Has anyone published a watts:lumen chart for today's popular LEDs?
Brother you missed the thread completly...
It's quite possible! I caught the:
"SST40 5000k LED in convoy flashlight. Battery current (LED has consume same) was around 2A.
3. SST20 4000K LED in convoy flashlight. Battery current (LED has consume same) was 1.75A.
4. LH351D 4000K LED in sofirn HS05 flashlight. Battery current (LED has consume same) was around 2.3A.
5. GT-FC40 4000-4500K LED in convoy S11. Battery current (LED current is unknown) was around 3.2A."
But I missed a table containing XPL Hi, XHP70.2/3, random Nichia, random OSRAM, perhaps others.
I definitely missed at what level those current readings were taken. I'll reread, because I assumed they were all on low, given the photos.
Thanks Djozz 
