Cree changed production process for XP-G2 emitters!

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giorgoskok
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luminarium iaculator wrote:
giorgoskok wrote:
All the 2B stock is from August 15 (asked welight this morning) the same as those Mitko received .

Ok,
I can understan everything but I simply can’t understand why he does not want to reply in this thread with macro shots of that reel so we would know for sure and risk those expensive shipping. If I am paying expensive shipping than I got to be sure I have real thing Sad

Wasn’t this thing the point of the emmiters mitko received ? Prove they are old ones ?

I wish i could buy , but i can’t pay 35$ shipping for 35$ order…

luminarium iaculator
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Is simple math…

Take macro shot of that reel… No need for group buy but owner of that store should confirm that they are old ones. No one wants to invest 500-1000 or more $ to get Mr. “New” Sick

giorgoskok wrote:
I wish i could buy , but i can’t pay 35$ shipping for 35$ order…

I paid even more than that but I really need them so I can’t negotiate price Smile

Mitko
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Quote:
I wish i could buy , but i can’t pay 35$ shipping for 35$ order…

I recomment you Newark, the past year i bought some high CRI cob emitters for my home interior from them, the order was for arround 120$, the shipping 42 via DHL and they tried to charge me 185$ for the “ packing, handling and freight”…

Who knows, maybe they started packaging in stainless steel gold plated boxes or something
shrick
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If anybody can help out with any old xp-g2 s4’s please let me know. Im looking for any qty available…

giorgoskok
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Mee too Sad

djozz
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LI has got them all now Big Smile

will34
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I’m about to remove the S42B from my meteor and replace them with XP-G3s, my meteor is from the first batch they should be the good stuff right?

I don’t commercially mod flashlights so perhaps I can sell a couple!

Edit: I must first wait for a CW XP-G3 and know for sure the output under a carclo is better before swapping them… Will let you guys know.

giorgoskok
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If you want contact me please Will .
Thank you

luminarium iaculator
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Yesterday I tried few old(good old) XP-G2 S2 1A dd. They all pulled around 4.8-5AA from fresh 30Q but they were unable to bring performance of older brother S4 2B at 4.4-4.5A (around 200 kcd in a light where S4 2B brings 250kcd)

Only good(or maybe not good to someone) with S2 1A is that it still has clearer upper neutral white tint (more white in a tint than with S42B, S2 1A is without green pigment at the edges).

So I am really looking forward for my incoming S4 two bees Smile

Mitko
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Quote:
older brother S4 2B at 4.4-4.5A

Not every 2b emitter could do that in a 1s setup and a fet driver,

In the matter of fact they tent at 4-1-4.6,

giorgoskok
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In about 15 days i will test the old vs new S2 1A , and report back here.

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Hhmm, thought I had only new S4 2B's, but seem to get 510 kcd in a single cell UF-1504. Got 4.25A at the tail on a EFEST 4200. The batch of 5 XP-G2's S4 2B ordered/came in Feb 2016 from IOS.

used the "hot gas" method, on a gas stove of course. Very safe, cooking gas in a pot of water over gas flames. surprised

luminarium iaculator
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Very simple to detect them by dot method.

Old has around 40 visible dots on emitter while New has more than double number of mentioned dots and they are very hard detectable.

luminarium iaculator
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giorgoskok wrote:
In about 15 days i will test the old vs new S2 1A , and report back here.

old S2 1A can hardly reach(it can but only if you are lucky with emitter pick) performance of old S4 2B.
And old S4 2B is better for FET drivers cause it sags less current(only 4.4A or less draw) while S2 1A will eat about 5A of current with lower lux performance than old s4 2b (but nicer tint)

So if you are going to compare old S2 1A vs new S2 1A that will be interesting….

Tom E
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Ok, just checked - it's 40 dots - definite, I counted them, or darn close. 5 rows of 4, 4 rows of 5. Order date of Jan 20th, 2016, shipped Jan 24th, rcv'd in Feb 2016.

Does this make sense?

luminarium iaculator
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Yes Smile

Tom E
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So what Hank was shipping in January was good? I ordered mine bare.

luminarium iaculator
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My new ones were ordered at 13 February 2016.

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Hhmm, guess I could have gotten lucky. Maybe the bare ones were remains from an old batch, or the new batch came in end of Jan, beginning of Feb. Sometimes he says the LED's are from a new batch or not, I've noticed. He's also very helpful when asked. I've asked couple of times for LED's bare that were not listed, and always were able to get them from him.

I should re-check tail amps then with my clamp meter - might be a little higher than 4.25A. I'm using 20 AWG wires and a FET+1 driver with the SIR800DP, springs bypassed with 22 AWG wires.

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Okay… Good info on the number of dots. I guess I need to get my microscope out and check the few XP-G2s I have in my kit. I have a number of older emitters, but mine are all likely 1A tint.


Keepin’ the “B” in BLF

Don wrote:
It sounds like the XM LEDs won’t really be suitable for flashlight use. Pity…

luminarium iaculator
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keltex78 wrote:
Okay… Good info on the number of dots. I guess I need to get my microscope out and check the few XP-G2s I have in my kit. I have a number of older emitters, but mine are all likely 1A tint.

2x magnifier is good enough for this.

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I realised which of them where old or new , according to the size of the die (with help from li).
It’s pretty obvious if you learn what you are looking for.

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I used a cheapo 10X pocket magnifier, along with my 2.00 drug store glasses to examine the dedomed LED, and that did the trick for these 58 year old eyes. I find magnification combined with a good light source really, really helps. My hands are still pretty steady. I work with a guy in hist late 60's and be does some super small incredible prototyping work still, but same thing - having the right tools is huge.

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Recieved my second batch from those( Cutter ones) today and dded 5 of them, they all went above 4 amps and one of those hit 4.9 amps….

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Mitko, those are the old style you are talking about?

Have more people tried the new style S4 2B? It seems like the main reason for the decreased performance of the new style is a higher Vf, causing less current to flow in a one cell setup. But the new style S4 2B that Richard tested actually had a lower Vf than the old style. Was that one just a fluke, or are there lots of new style emitters around that actually have a lower Vf and might still be good performers? I realize the new style also has a slightly larger die size, but not by very much.

luminarium iaculator
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Mitko wrote:
Recieved my second batch from those( Cutter ones) today and dded 5 of them, they all went above 4 amps and one of those hit 4.9 amps….

Mitko which emitters did you received and can you confirm they are from good old batch?

mapache
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luminarium iaculator wrote:
Mitko wrote:
Recieved my second batch from those( Cutter ones) today and dded 5 of them, they all went above 4 amps and one of those hit 4.9 amps….

Mitko which emitters did you received and can you confirm they are from good old batch?

It might be an idea to get this info via PM. You don’t want them to sell out before you get a chance to order.

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Yes m8, they are, talking about S4 2B…yet as mapache “predicted” those are sold out allready, i presume BLFers drained the stock out Big Smile

P.S

330 kmcds out of Olight m2x running at 4.6amps and a single battery, same with B158: yet it seems that B158 is more throwing when scope checked

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If only I could predict the lotto numbers now!

The individual emitters sold out weeks ago. There are still some on stars but I don’t know if they are old or new. I plan on ordering a few to check but need to wait until I get paid in a couple of weeks.

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Mitko wrote:
Yes m8, they are, talking about S4 2B…yet as mapache “predicted” those are sold out allready, i presume BLFers drained the stock out Big Smile

P.S

330 kmcds out of Olight m2x running at 4.6amps and a single battery, same with B158: yet it seems that B158 is more throwing when scope checked

I always claimed that same kcd values of reflector vs aspheric are not same… With aspheric you’ll see further in a night.

I have 340 kcd reflector and visually it does not out throws even mine 250 kcd UF 1503. Both measured on same light meter at same 7m distance.

So is this perception(the way we percept things) or beam spreading at a distance I can’t tell exactly.

I got my 8 good, old and precious XP-G2 S4 2B and messed 2 of them by by stupid recklessness so Smeagol is very angry now

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