Alibaba GT-FC40 tested (a 5000K 95CRI 12V domeless XHP70 replacement, supplied by rngwn)

Thanks for testing, interesting for sure!

Can you desolder one and give us a look at the footprint of the led?

Thanks to rngwn for supplying djozz with these leds to test and to djozz for doing the testing. I still use your charts djozz for comparing leds. :+1:

Thanks all of you for the appreciation! And nice to see you are still around Steve :slight_smile:

Thank you for the tests djozz.
Nice CRI and Duv but they should improve the manufacturing process.

Thanks djozz, looks like a winner. :slight_smile:
This led is made by Getian. I wonder how it throws…it’s probably flip-chip so may be worse than wecould hope for.
Looks like a great use for the loneoceans 100w boost driver. :slight_smile:
I also wonder about the performance of lowers CRI variants….

The 70 CRI 8000-9000k is quoted nominally (at 3A) at 3000-4000lm. That should translate to 3500-4500lm at 5000-6000k CCT.

The one Djozz tested is quoted at 3000-3200lm @3A.

With Simon’s 12V driver it should yield more than 2000 high CRI lumens on turbo. I’d be satisfied with that for now until something better comes along. Thank you for the test, djozz!

Good work Jos… :wink:

Steve’s waiting around for you to finish the flashlight so he can provide his address… :stuck_out_tongue:

:stuck_out_tongue:

If this led was in 3V I would have many ideas for it and probably the first flashlight already built.

Edit: it is at least not a design problem, looking at how the led is build up for 12V, a 3V version would simply look like this:

I unsoldered the led to have a look at the footprint. It looks like it uses a board made for XHP70 in 12V configuration. I checked continuity of the thermal pad and the core and there is, so the board is DTP: the entire thermal pad seems one with the core.

The footprint looks like its for 12v only. But at least you can swap the MCPCB size.

So, what happened to this LED? No news in over a year…

Still for sale, still a nice led.
There are some reports of the use of this led in rngwn’s sales thread: WTS/GB: [4000k ARRIVED, Test Report's In] GT-FC40 (a.k.a. XHP70's flattop, 12v 40w sister) 95 CRI, Available in 4000k, 5000k

Simon also got samples of this LED from Getian, but no further details. I think he said he used to work for this company at some point in time too.

I took some beamshots

I’ve never seen a bare 12v or 6v mcpcb… 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 I’d like to examine it.

Some are configurable like (at least older) Sinkpads. But a 6V will look like a normal mcpcb with “three-stripe” pads. The 12V will have a “s” shaped pad where the Anode and Cathode are split and half are connected to the thermal pad. Pic from Djozz on the first page… 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.