Cree changed production process for XP-G2 emitters!

Old production type report…

It was asked somewhere above if someone had checked the S3 3D from intl-outdoor for production type. The date on the reel picture being later than the date that shows currently on reel picture at the new production type S4 2B, it was not promising.

Nevertheless I ordered a few to check, and with the 3D tint being on the pink side of the black body line, dedoming could very well produce an acceptable tint.

They came in today and to my surprise they appeared old production type. I hot dedomed two (one fail: small chip of phosfor came off :frowning: ) and from the good one I made a Brynite B158 pill with a AK47-FET driver.

The tint is indeed agreeable, a very acceptable neutral white without any hint of green, even wood tints look ok-ish, a bit yellower compared to non-demomed 5-tinted leds (I compared with BLF-A6 with 5A XP-L) but at least way better than the (old type) dedomed S4 2B tint that on a white wall looks good but makes a yellow-greenish mess of wood tints.

I got 282 kcd throw out of the Brynite (measured at 7 meter distance, freshly charged 30Q, 30 seconds after switch to high). That is 13% less than I get with the dedomed S4 2B pill (322 kcd).

Pretty good throw, certainly old production type level, but going from S4 to S3 promises only 5% loss. Apart from possible individual led and build differences, my theory for that is that due to the larger amount of blue light already converted to longer wavelengths by the phosfor of a 3D led compared to a 2B led, dedoming can not give the same amount of photon recycling, which is mostly about blue photons reflected back into the phosfor to get another chance for conversion and adding to the light directed to the lens.

Anyway, for me the 13% less throw of the 3D is sort of balanced by the nicer tint. This is not my last build with this dedomed S3 3D led. :slight_smile:

I'd say good news! Thanks for the testing!! I'll have to order some as well.

Djozz,

Good news… You were lucky :slight_smile:

Yes same thing with mine new S3 2B emitters (10-15% loss comparing to old s4 2B). And less current draw on our Djozz fet driver (only 3.95 - 4.1, while old S4 2B from 4.3-4.5)

Tint is same as old S4 2B and my favorite tint of course no matter you say :stuck_out_tongue: :wink:

thanks ,time for order .

Thanks Djozz… Valuable information, Appreciated.

luminarium, you need to sell everything you’ve got and go out and buy up all these old stock emitters, before these other guys do! :stuck_out_tongue:

somewhere someone must have a forgoten rail with those old S4s :frowning:

Even sadder thought: Somewhere, some major lighting manufacturer has multiple reels of those old S4’s that they will be throwing away because they are upgrading their whole product line to XP-G3.

Well I think 142 pcs of XP-G2 S3 2B will be enough for some time… :smiley:

But as I said they are not S4 2B… So only in a case of resurrection I will buy another lot.

can anyone identify from those crappy photos ,what version i got ?

Aaah, every time i see this topic makes me feel quite ok that i have stacked quite a good ammount of those old S4 2B: thanks Australia ( and MRsDNF ofc)

nofearek9

Pay attention that even if they are old ones and doesnt mean they are great: i got very close results with S2 1A from the old ones and S4 1A from the new ones( Mouser breeds)

On the other hand nothing can compare with S4 2B….i got some time today and made 2 B158 for the upcoming hunting season…one came up to 343k cds/ 312 after 30secs ( running at 4.8 amps, fresh VTC6): imbalanced zoomie definately, even better than my own

this one is s4 2b from intl-outdoor,hope its the old version.

Check from this :

Also , when you ordered them ?

i think its the old version the order was January, 2016

Probably old ones

have 1 from may 2015 and looks the same to me.

@nofearek9: Your pictures clearly shows they are old production type.

thanks djozz for the confirmation.

Old production XP-G2 S3 2B really sucks if I compare it to old XP-G2 S4 2B. Like Mitko said pick is necessary to get close to performance of old G2 S4 2B. But they are way better than new production XP-G2 S4 2B!

Old XP-G2 S4 2B had incredible consistency, they were all great performers… Slap it in and candela rises! And I should not fear that I will got rotten egg among them… That never happened(unless dd went wrong way)…

I still can’t accept the fact that in 2016. I have to build lower performing lights (candela vise) than lights I did year ago only because Cree changed production process for them. End they have tendency of releasing even more crappy emitters than “new” s4 2b. That fact is eating my nerves…

If you have real racing horse would you change it to mule? I can’t curse on this forum but -?!*? :smiling_imp: Cree.

A topic update:

Since i order regulary from various sources i `ve found THOSE recently

It seems they are 1d bin, quite a nice looking tint( for my taste) after electrical dedoming plus they perform quite okay( 160k in C8 and 300k in b158, 100k in X6) : ofc they are ” improoved” too yet those are the best improoved XPG2 chips that i`ve found so far

We dont have that great option allright, one cant trust Fasttech binning and labeling : they send whatever they have, IOS have only s4 2b and most of those s2 and s3 bins( or shall i say all of them atm) are also improoved ones

At this moment, XPL CANT take the XPG2 place : bigger hotspot and bigger halo in the reflector based throwers: and especialy the halo thing makes it not okay especialy for a scope hunting