XP-L2

The little arrow on the bottom points towards the ground pad.

it looks like this: V+ - > - Ground

Thanks TA! That makes it clear. :slight_smile:

Yes, Mouser now has the XP-L2 U6 (good bin for 90cri!) with 4000K, 90CRI and 2-Step Macadams binning (941-XPLBWT0000UU640H).

The “40H” part of the datasheet indicates that it’s 4000K 2-step and the graph in the datasheet shows that these LEDs will be have a slightly yellow tint above the bbl, but at least consistently so.

To get the lumens from Texas_Ace’s test of the v5 Bin just multiply his lumen measurements with 0.76. So at 5A the U6 should produce around 1254lm. Comparing the numbers at 3A it seems the the numbers in the test are a bit lower than those of Cree for 85°C, but it’s a small difference.
Compared to the Nichia 219C D240 9050 Test Texas_ace did, these numbers are a bit underwhelming (the Nichia did 1063lm @5A in it’s test).

EDIT:
There is a better way to calculate lumens at high currents through using the tests here in the forum. Using simple cross-multiplication I determine a percentage of how much the brightness increases from a current in the datasheet to the current that interests me. According to Texas_Ace’s test the XP-L2s lumens increase by 45% going from 3A to 5A. The Nichia 219Cs lumens increase by just 32% which shows the smaller DIE and worse thermal resistance.
Now I can just multiply this with the lumens from the datasheet or Cree PCT and even choose a realistic temperature which the LED will have in my light.

So at 5A and 85°C the XP-L2 U6 will do 1292 - 1370 lumens (to understand this one has to know that Cree lists just the minimum values in the PCT tool and that Bins are usually 6% apart). That’s really not too bad for a high-cri LED. The Nichia 219C R9050 in D240 bin does 893-968lm in the same conditions(I used the same way of calculation, but used 1A instead of 3A since that is still within Nichias official limits). So now the XP-L2 is actually around 43% brighter at 5A and 85°C. That’s definitely a noteworthy difference.
I also calculated the efficiency of both LEDs. The XP-L2 does 75-79 lm/W at the above current and temperature. The Nichia does 55-59lm/W.

For me the biggest advantage is actually the larger DIE size and correspondingly larger hotspot, especially in compact lights like my headlamp. Except for the Nichia 144A (only 6V and 12V) all the nice high-cri LEDs from Nichia, Osram and Lumileds have either a small DIE or are not available in neutral white.

That link goes to an 80cri 4500k but that actually sounds really interesting. Hmmm, 80cri and more lumens or 90cri and less….

Thanks, I fixed it :wink:

I would never trust the specs which they list for a product. I always check the specs for the Cree part number in the datasheet.

I’d welcome smaller die and brighter hotspot. I guess in 10622 it would be too floody for my liking…Even 219c is too large for me. Nevertheless, interesting option.

The xp-g3 throws a bit better then an xp-l2 but none of the latest gen LED’s match the last gen. The xp-L HI is still my go to for throwers (unless I have access to 12V, in which case it is the xhp35).

Not all, XHP50.2 throws better than XHP50.
If we’re going with hi-cri emitters, why pick XP-G3? It may be high cri, but it still looks bad….

I’m in the middle of compiling some data for a selection of 90 CRI emitters for use in my next EDC, I wonder what will prevail. Probably 219c D240 will win over XP-L HI T6 and XP-G2 R2 and 219B D200.
Added: And XP-L2 U6. :wink:

I have now an SST40 which is far from high CRI but it can be dedomed and with a FET driver it can run at 7,5A. I will try it soon dedomed in a C8 with a TA17 driver what it can do.

I just put one in an olight sr52ut with dd and three parallel cells. I’m loving the tint! Just hope it holds up to the 8.2-8.4amps it is pulling. :slight_smile: it should be close to 2400 lumens as it is not dedomed. I’ll measure the lux as soon as I can get everything back to get her for the final go around.

About Mouser’s XP-L2’s, I have a few of the 4000K 80 CRI ones and apart from the better than worst CRI, the tint is exactly what you want from a 4000K led: slightly yellow slightly rosy, very nice and nothing like the ugly 70CRI 5-tints that I know from Cree.

Which excact ones did you get? It makes a difference which Macadams-Bin they are in (if at all…). The “best” Macadams Bin (2-step) actually is alctually most likely to have yellowish tint (for 4000K Cree LEDs).

How noticeable is the yellow corona?

They have just one in 4000K 80 CRI, it is Cree partnr. XPLBWT-00-0000-000HV340G

In my Maratac with small OP reflector the corona is really bearable, you notice it only if you look for it, I have not tried it in another light yet.

I have 1 or 2 of those same LED’s floating around. I agree, they have a very tolerable tint. I really like the lights that have them. Very bright as well.

I put one of the aforementioned XP-L2 U6 with 90CRI, 4000K, 2-Step into my Lupine Tesla and described that here (use google translate, it’s in German). The tint is yellowish, but outside it’s not bad. Because of the yellow tint and the slighty textured reflector of my light the yellow corona is not really noticeable as others have reported as well. The spot is warmer and much more yellow than the spill though. For me it was worth it because of the bigger die size compared to the Nichia 219C.

I published my test of

XPLBWT-00-0000-000BV540E - XP-L2 V5 40E (min. 70 CRI, 4000 K) and
XPLBWT-00-0000-000UU640H - XP-L2 U6 40H (min. 90 CRI, 4000 K)

There are weird differences in performance between both types. In general, in some cases the XP-L2 is not the best choice. The inconsistent color distribution in clear optics is also a problem.

Isn’t the 70 CRI, XPLBWT-00-0000-000BV540E a 5-step? I think the visual difference is to be expected.

Yeah, but 5-step doesn’t say anything about the efficiency (for this Cree uses the categorizing into specific groups named ‘binning’). This is explained in my test. :wink:
5-step says that the variety of possible tints is very high and could result in ugly greenish or yellowish tints.

So far I know, Cree ships only one tint / color acc. to CIE1931 color space in one reel (250 to 1000 pcs).

Considering the current stock of XP-PL2 in the market, I think it makes more sense to just go for better CRI, instead of chasing the highest flux bins for a particular CCT. If your test is an indication, it appears that Cree is not consistent in their production and performance values of their XP-L2 binning. If a V5 is nothing more than an overrated V2 or V3, what’s the point really?

I would not generalize my results to all XP-L2 V5. Firstly it indicates that the LEDs of the reel available at Mouser (where I get the tested emitters from) are affected.
But there might be some difficulties at the production process we don’t know, I measured such weird performance deviations at a XHP70.2 too.