XP-L vs XM-L2 OTF Tests

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Hikelite
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pflexpro, can you test T6 3C vs V4 3D, like the 5V vs U2 the V4 should be slightly above T6.
For me as like for many others 3C has that unwanted slight greenish in it V4 3D seems like a great pinkier/neutral alternative to 3C. I've some XP-L V4 3D on the way.

XP-L V4 vs XM-L2 T6

Hikelite
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Actually here are some other comparisons from the CREE PCT.

XP-L V5 vs XM-L2 U2

XP-L V6 vs XM-L2 U3

 

 

 

RMM
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Thanks for doing a side-by-side for us.  

I do like the power/tint combo on the XP-L, since I'm more of a 2C/3C kind of guy than a 1A kind of guy.  

Rumor has it that the U3 binned XM-L2s are going to be coming out soon, which may level the playing field yet again.  

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RMM wrote:

Thanks for doing a side-by-side for us.  

I do like the power/tint combo on the XP-L, since I’m more of a 2C/3C kind of guy than a 1A kind of guy.  

Rumor has it that the U3 binned XM-L2s are going to be coming out soon, which may level the playing field yet again.  


can you reveal the source of this rumor?

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RMM
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If I told you I'd have to kill you!  Surprised  Well, I don't wanna say who it was because I'm not sure on the timeframe, and there have been delays before on this sort of stuff, but I would rate the source as "highly credible".  

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Omega_17
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Quote:
Rumor has it that the U3 binned XM-L2s are going to be coming out soon, which may level the playing field yet again.

They already has been out for a long time but in very small numbers.
Cutter have them : U3 in 1C tint and U2 in neutral white.

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RMM wrote:

If I told you I’d have to kill you!  Surprised  Well, I don’t wanna say who it was because I’m not sure on the timeframe, and there have been delays before on this sort of stuff, but I would rate the source as “highly credible”.  


could you tell us who after it is released?
Omega_17 wrote:
Quote:
Rumor has it that the U3 binned XM-L2s are going to be coming out soon, which may level the playing field yet again.

They already has been out for a long time but in very small numbers.
Cutter have them : U3 in 1C tint and U2 in neutral white.


If it were any chinese website i would assume it was a fake, but cutter has a good reputation to lose if they are lying

The Journal of Alternative Facts TM

"It is critical that there is a credible academic source for the growing and important discipline of alternative facts. This field of study will just keep winning, and we knew that all the best people would want to be on board. There is a real risk in the world today that people might be getting their information about science from actual scientists"

 

 

 

baterija
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pflexpro wrote:
Two of each lights were built and all test results were averaged.

Could you share the data for all 4 samples instead of just the emitter averages? It would be interesting to see the spread within the emitters as a backdrop to the spread between them. Especially given all the variances just in the data sheets.

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RMM wrote:

Thanks for doing a side-by-side for us.  

I do like the power/tint combo on the XP-L, since I’m more of a 2C/3C kind of guy than a 1A kind of guy.  

Rumor has it that the U3 binned XM-L2s are going to be coming out soon, which may level the playing field yet again.  

I thought the TangsFire C8 8W XM-L2 U3 1300LM Aluminum Alloy Flashlight Black from here TangsFire-C8-8W-XM-L-U3-1300LM already had a XM-L2 U3?

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Sure - TangsFire has a U3. It's a Chinese U3 Smile. The only real U3 in a light I'm aware of was the ArmyTek, but they ran out pretty quick. Since there was a real CREE batch of U3's released a while back, all the marketing hyped Chinese sources claimed they had them. I finally had enough of these false claims and proved it by comparing one source's claimed U3 to T6's and found the T6's equal or brighter, and U2's definitely brighter. If they claim U3, like TansgFire, chances it's a T6 at best.

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Yeah, my $12 Ultrafire C12 I bought last year also came with an "XM-L2 U3", it even says it on the side! Tongue Out

iOS has them and I will have them soon.

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Surprised - now this I'm feel'n!! "Trust in Hank" - the only trustyworthy source on that side of the planet. Illumn, IOS, MtnE, Cutter - only ones I know of to trust bins and tints from.

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Thanks Richard, you work very hard for us and it’s greatly appreciated!

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Thes are the XP-L dyes - interesting because the early availability of "2A" match's well to the XP-L's.

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I bought 10 XML-2 U3 2C tints from Cutter a while ago. I went back 2 weeks later and bought the last of their stock which was about 4. As far as I know they have not had any since. I have in the one light, its a triple, two of the XML-2 U3 2C and one XML-2 U2 2C and I think I can tell the leds apart shining the light on a wall up close with brightness but probably kidding myself. Heres three of the most scientific pictures l've ever taken with the light rotated each picture.

Looking at these shots you can pick it.

 

djozz quotes, "it came with chinese lettering that is chinese to me".

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U2 is on top in the middle picture? (you should consider a carreer in science Steve, looking good! :bigsmile: )

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Tom E wrote:

Surprised - now this I’m feel’n!! “Trust in Hank” – the only trustyworthy source on that side of the planet. Illumn, IOS, MtnE, Cutter - only ones I know of to trust bins and tints from.


how about mouser?

The Journal of Alternative Facts TM

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If you could get specific tint info from Mouser, yes. I know in the past all they had was the range grouping. DigiKey of course, as well - not sure if they carry much though.

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The problem with Mouser & Digikey is that they're expensive compared to the other options.  Even buying 500 LEDs they are still a little bit more expensive than what I charge for the bare LEDs!  The only way to come out ahead is to buy 1,000.

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Crash testing an xp-l will give us more information about their limits. Can it handle the current better than xm-l2?

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zeremefico wrote:
Crash testing an xp-l will give us more information about their limits. Can it handle the current better than xm-l2?

No, they max out at about 7A, while the XM-L2 still gains output up to the point that they crash at ~8.5A

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djozz wrote:

zeremefico wrote:
Crash testing an xp-l will give us more information about their limits. Can it handle the current better than xm-l2?

No, they max out at about 7A, while the XM-L2 still gains output up to the point that they crash at ~8.5A

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XM-L2's peak output is a little higher but at much higher current. What's with the fascination of pushing the maximum current possible? I'd rather have equivalent output at less current, thankyouverymuch.

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How much more efficient is xp-l at 3+++ curent?

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Djozz's thread shows a pretty underwhelming XP-L V6 compared to what CREE says. Basically only 50lumens difference from XP-L V6 to XM-L2 T6 at 3A.
On PCT.CREE.COM they show a 177 lumen difference between XP-L V6 and XM-L2 T6  at 3A

Thinking of Djozz  tests I would think theoretically V6 would only be identical to U2, but when I look at Pflexpro's test in this thread I see a V5 that is brighter than U2, more like in the line of what CREE says.

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+1 HikeLite - these result are quite different. Not really sure what to make of it, but maybe the poor accuracy for cheap light meters to measure neutral light is an influence. djozz's were done on neutrals, while here (pflexpro) were done with cool whites. Also, djozz did the tests on the bare emitter while here they are done in an assembled light (more real world maybe?).

Also I've seen the U2 1D's under perform compared to U2 1A's, but who knows - could be because of the tint's effect with the cheap light meter I use as well. I betcha though the poor performance I've seen with 1D's had an influence on these test results.

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I don't know either why the results differ, bare emitter or in a flashlight, differences between leds should come out equally well. I tested two XP-L V6 2A leds and they tested nearly the same.

Last week I did a test twice on XP-L U5 7A3 80CRI leds (from intl-outdoor, unfortunately I killed them both) and they put out 1650lm at 7.5A, while the 2A V6 puts out 2120lm at 7.5A . These results seem to match the bin-difference between the two XP-L's, I have no idea why the XP-L V6 tests similar to a XM-L2 T6 (2100lm@7.5A).

BTW, my XM-L2 bare led result is a bit higher than match's test 1.5 years ago (match:1740lm@6A, djozz:1920lm@6A), assuming that match used a T6-bin, he did not mention the bin. (our spheres use the same luxmeter (Ceto 1330B) so that can not be much of a source of error between us)

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Later in the thread, match said U2 bin for his tests. He should have updated the OP - didn't though.

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Tom E wrote:

+1 HikeLite - these result are quite different. Not really sure what to make of it, but maybe the poor accuracy for cheap light meters to measure neutral light is an influence. djozz's were done on neutrals, while here (pflexpro) were done with cool whites. Also, djozz did the tests on the bare emitter while here they are done in an assembled light (more real world maybe?).

Also I've seen the U2 1D's under perform compared to U2 1A's, but who knows - could be because of the tint's effect with the cheap light meter I use as well. I betcha though the poor performance I've seen with 1D's had an influence on these test results.

If you look at the binning and labeling of XM-L/XM-L2 you will see that for making a "good choice" with not tons of tints you got group E1 or E2 for cool whites, basically  U2 E1 or U2 E2 so as far as CREE is concerned they sell you U2 brightness and for them E1 (1B, 1C, 1A, 1D), E2 (2B, 2C, 2A, 2D) or other tints (2T, 2R, 0C) fits the U2 brightness bin.
As we know the min. max. difference is about 6% from the least bright T6 to the most bright T6 (as an example). A much higher difference than that should be put on the lightmeter's accuracy levels, various temperature factors, etc.
 

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