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.
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….
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.
I must admit that I expected a better result, which is why I done it again with a second emitter.
Maybe it has something to do with the application of the phosphor & the dome as a package, & when the dome is taken out of the equation, it all goes pear shaped. :question:
Yeah, there seems to be something like that going on. I think MEM posted once that a de-domed XP-G3 has a concave surface to the phosphor. I dunno. With a total output (domed) in the range of XM-L2, and the die size similar to XP-G2 (not much different/larger), there should be no contest on throw. Here’s hoping somebody gets to the bottom of this before it drives us all crazy! (For some of us, that’s a short drive.)
Oh, by the way, thanks for doing this testing and posting results. Forgot to say that before! :innocent:
Yes, I did measure the domed XPG3. In an eagle eye X6 with bypassed springs and a fresh 30Q, I measured 58.6kcd. An XPL HI V2 3B in the same host did 71.4kcd. The XPL draws considerably less current to do it, also.
Sorry if I’ve missed this, but is a regular domed XP-L a better choice for “max lumens” versus an XP-G3? I’m looking to mod a second Nitefighter BT40S bike light (1st one modded with Nichia 219C’s - 4 LEDs @ approx. 2.0A each) and was going to try it with XP-L’s to go for more lumen output. I probably won’t boost it to 2A per LED though; think I’ll come down a little but not sure where. At 2A per LED with the 1st light my low mode really isn’t low enough and turbo is just for “WOW” factor and heats the light up too hot too quickly for normal riding.
Suggestions? (Sorry, don’t wish to derail; just trying to grasp where XP-L stands versus XP-G3.)