Cree XP-G3, testing a S5 3A emitter

Whats the next move? :weary:

You, my friend, have a knack for problem solving. Marital bless, and my somewhat dimmish dome, shall be maintained if I ever try a slow dedome. :slight_smile:

Well, I wouldn’t call it a complete failure, the phosphor is still intact, and it does light, so partial failure at worst.

I’d call it Success with complications.

Whats the beam pattern like? Did the tint shift significantly?

Sirius, you do know that the square in the middle is the die, right? That phosphor around the edge doesn’t even matter. You can probably just scrape it back to get straight edges again and it will be fine.

Of course I know that and I thought to scrape it off but I wanted to show to BLF members first how it looks after slow chemical dedome without beauty treatment :slight_smile:
Also, you can probably notice that top and left edge of the emitter die is missing some phosphor, that phosphor was stuck on the silicone dome and this was not caused by my forcing the dome but was already like that when I pullet the emitter from the gasoline, swelling of the dome caused that.

So what if we combine gas dedoming and hot dedoming? instead of just sitting the emitter in gasoline, hook it up to a power source and run it at 1amp or so while it sits in the gasoline. It would also keep the gas a bit warm I would think.

Warm? Maybe…

3v isn’t going to cause any sparks (especially submerged), and liquid gasoline isn’t that flammable anyways.

Yeah, I know. :stuck_out_tongue:

:face_with_monocle:

So, who’s going to try it on a G3?

YOU! :student:

Still waiting to get mine!

Great test. Very similar to the results I got here.

I love your graphs. Much better than mine. What program are you using to do those in?

I use the chart options from Excel. A bit of a pain, but nothing is automated in my tests anyway, slow slow slow!

(I have been thinking about automating my emitter tests, but every step being slow and manual does add more control over the testing and possible faults than an automated set-up)

I managed to de-dome a couple of XP-G3 S5 2C's yesterday, & spent some time testing them in the same Courui D01 that I have used recently to test some other emitters.

The de-dome was relatively clean;

Unless I'm doing something completely wrong, there's no way these things are going to be the new 'throw king' in a reflector light.

Running the emitters at their peak output (~8 Amps), the highest reading I could get was 264k.

I de-domed & tested two emitters, one on a Maxtoch 32mm board, the other on a Noctigon 32mm. Both were within a few k of each other.

In comparison, the 'good' XP-G2 S4 2B netted 443k under the same test conditions.

Even the Oslon 3rd Gen managed 410k.

The question of die-size between the 'good' XP-G2 & XP-G3 has popped up a couple of times. Here's what I measured with my dial-calipers;

'Good' XP-G2; 0.0530"

XP-G3; 0.0555"

So it is slightly bigger. But the XPL is a lot bigger, & an XPL HI V3 punches out ~360k in the same host...

New Throw king? I don't think so.

- edit to correct bin/tint of the XPG3.

Thanks for doing the measurement. Did you happen to test the with-dome XPG3 in your host? Has anybody done lux measurements with the stock XPG3? From djozz’s lumen measurements and comments it seems like it should perform pretty well even with dome since its output was close to the XPL HI that was measured.

Didn’t try with the dome on, sorry. I may give it a go out of curiosity, but I can’t see it being any better than XPL, plus at ~8 Amps, the cells are going south pretty quick….

FmC,

Thanks for test.
Even bad(new production process) XP-G2 seems better than new XP-G3. So is there a reason to be enthusiastic about this emitter?
I think there is no reason for that.
Even if it could driven at 8A reach performance of good old XP-G2(s42b for ex) driven 4.2 –4.5 A; same performance should not be considered as an improvement imho.
I want to say that at that current sag G3 would really have to be special and have more than 20% better performance than old good G2.

From your test guys I think that is not going to happen.

Thanks for the test mate. I like this emitter its a good mix and plus the price is great. It is just as bright as a XML2 ( the harden driven XML2 i own is only 5amps) this does use more power and it throws almost as far a XPL-HI so i would place in between these two!

I bought some on DTP copper boards for $3 compared to the $9 each i paid for the XML2 and XPLHI.

I have a XPG2 sitting here but no host for it i really want to DE-dome it and try it.

Something doesn’t add up here. Not questioning you, or what you saw. Just saying that mathematically, the results you posted here don’t add up somehow.