New Osram Oslon Square, testing a 4000K 92CRI typ. emitter

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Hopback
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Hi Djozz, thanks for finding these leds. I have a few on order from RS, but was wondering how easy they were to reflow onto xp mcpcb’s as the dimensions dont quite match up?

Cheers Gurthang for helping to decode the part numbers, its easy when you know how! Smile

Woody

djozz
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Hopback wrote:
Hi Djozz, thanks for finding these leds. I have a few on order from RS, but was wondering how easy they were to reflow onto xp mcpcb's as the dimensions dont quite match up? Cheers Gurthang for helping to decode the part numbers, its easy when you know how! Smile Woody

Reflowing on xp-boards works, but you have guide the led more and use not too much solder paste  because it is way more difficult to squeeze excess solder out from under the led (see also  post #10)

thanks to Gurthang as well for deciphering the osram code!

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It seems that a bit of practice is required….good job I ordered more than I need (at the moment!)

chouster
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Gurthang wrote:
5F7G means emitter tint is 5F to 7G (look at the chromacity chart, similar to Cree chart but different tint codes) indicates 5700K – 5500K which is a pretty tight tint grouping.

It’s not that tight, you must have gotten something wrong when reading the chart. 5F to 7G is more like 5700K – 5300K.

pscal
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I picked up a few of these and the tint appears to be a little bit green. I think I prefer the Nichias and 2700k xm-l2’s, but I will give this one a little more time.

I got the following Mouser part:

720-GWCSSRM1CCMQMS5L
MFG Part No:GW CSSRM1.CC-MQMS-5L7N-1-700-R18
GW CSSRM1.CC-MQMS-5L7N-1-700-R18
Osram High Power LEDs – White
US HTS:8541402000 ECCN:EAR99 COO:MY

ReManG
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Sinkpad has triple stars for these, as well as 20mm stars… No 16mm, and they are DTP, but aluminum….

I have put a couple on XP Noctigons, but the triples I cannot get all three aligned enough to do correctly, one is always off…

If there is enough interest, we could do a bulk buy of the sinkpads as they have a MOQ of 40-50 pieces…

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I would be in for two, perhaps for the led of the OP, but also anticipating on the availability of the 4000K 96CRI variant of this led someday :-).  Does anyone have connections somewhere to get the 96CRI in small enough quantities? At least they are not at rs-online.

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96CRI? That would be something I’d like to see.
There is however going to be a change to the CRI measuring standard coming soon.

http://www.cie.co.at/index.php/index.php?i_ca_id=981

Basically, it hasn’t been updated since 1974.
“However, with the rapid uptake of LED lighting, which has greater freedom in spectral design, the need to update the CRI has significantly increased.”

battery
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This is the first I’ve read about this old LED but I like what I see. Are there any places that sell high CRI Osram Oslon Squares already reflowed on to PCB’s?

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battery wrote:
This is the first I’ve read about this old LED but I like what I see. Are there any places that sell high CRI Osram Oslon Squares already reflowed on to PCB’s?

Not that I know of. I have bought mine at rs-online (without PCB) and there is not many other places selling the Osram leds. Learning how to reflow a led is not a major trick, you could have a go at it using solder paste (I use this, it works fine) and a hotplate (something fancy with temperature regulation at ~200degC is ideal, but many people simply use a pan on the stove which requires closer monitoring when the reflow is done to prevent overheating of the led). There are some extra tips to be found here on BLF if you search for ‘reflow soldering’.

Btw, Osram lists high CRI versions of the newest 3rd generation Oslon Square now, when they go for sale they will perform even better than the led of the OP/

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Jerommel wrote:
Just got 7 of these buddies in:
http://www.ebay.com/itm/282084757165?_trksid=p2057872.m2749.l2649&ssPage...

They have a bunch of different Osram LEDS:
http://www.ebay.com/sch/m.html?_odkw=&_ssn=jwhpargos&_armrs=1&_osacat=0&...

Many 90+ CRI LEDs


Good find, lots of Osram leds for good prices.

But mind that the type nr LCW CQAR that is in the descriptions of all their Squares are the first generation Oslon Square, while in their pictures the second generation is shown (GW CSSRM2). Sneaky!. I tested the second generation as much better! (and now there is a third gen, even better but no high CRI versions on the market yet)

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Mine have ‘HWHEWTCV2’ printed on them and they look exactly like the ones in the LED reference topic.
I was hoping it would be 2nd generation, but i wasn’t sure.
Thanks for pointing it out.

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Lcw cqar = 1st gen
Gw cssrm1 = 2nd gen
Gw cssrm2 = 3rd gen

Why did you buy them with 2700K?
I just recently bought the same LEDs there with 4000 K.

Does anybody know a supplier which sells gw cssrm1.bm with 4000K in small quantities?

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The_Driver wrote:
Lcw cqar = 1st gen
Gw cwrssm1 = 2nd gen
Gw cwrssm2 = 3rd gen

Why did you buy them with 2700K?
I just recently bought the same LEDs there with 4000 K.


I just want to put one or two (or three) in AAA lights for fun and upgrade my 2 Watt goose neck lights at home with high CRI.
So they’ll find a job. Smile
For 4000K i have a bunch of 219C.
I also got a 4000K 95CRI 30Watt COB from them, plus 100 pieces of 0.5 Watt 5630 4000K 95CRI for a head lamp idea (not all 100 of them obviously..)
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Jerommel wrote:

For 4000K i have a bunch of 219C.

I just put some more 219C’s in the mail for you.
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djozz wrote:
Jerommel wrote:

For 4000K i have a bunch of 219C.

I just put some more 219C’s in the mail for you.
Thumbs Up Thumbs Up Thumbs Up
Awesome!
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djozz wrote:

I would be in for two, perhaps for the led of the OP, but also anticipating on the availability of the 4000K 96CRI variant of this led someday :-).  Does anyone have connections somewhere to get the 96CRI in small enough quantities? At least they are not at rs-online.

The Osram Square Gen2 with 95CRI is now available in smaller quantities in some places. I just got some today. I can’t say much more than that right now.

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The_Driver wrote:
djozz wrote:

I would be in for two, perhaps for the led of the OP, but also anticipating on the availability of the 4000K 96CRI variant of this led someday :-).  Does anyone have connections somewhere to get the 96CRI in small enough quantities? At least they are not at rs-online.

The Osram Square Gen2 with 95CRI is now available in smaller quantities in some places. I just got some today. I can’t say much more than that right now.

Thanks for the heads up. I bought a few 4000K ones at led1.de. They have placeholders for 90CRI 3rd gen. Squares too, but nothing in stock, like the rest.

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FWIW, those Oslon Square gen.1 2700K i bought from ebay are probably ‘9080’ as they call it, lots of red, more than 219C 3000K.
Looks really ‘incan’ Smile

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Chouster sent me a high CRI Oslon (GW CSSRM1.BM-MPMR-XX55-1) for testing since he doubted it was the real deal with all the green. Yes, it’s horrible in tint, one of the worst (tint dev. almost 0.01) but does exceed CRI 90.

Here it is stuffed into a Thrunite TC12 V2 on max mode.

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Maukka, thanks for the detailed test. Could you also post the test done with the light in low or mid mode? The R9 ist noticeably higher at lower currents.

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Yep, here’s mid. And you’re right, the CRI gets higher with lower currents. I got 90 on moon.

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Thanks maukka, you answered a question that I had for a while.

So why does Osram make these tints and Nichia the other tints? Some thoughts.
1) a matter of preference, there is a market for the ‘Osram Green’ Wink , as there is one for the ‘Nichia Rose’.
2) it is the most energy efficient way to obtain 90 CRI (?) , and customers just go for the claim, not for the actual tint.
3) with the set of phosfors that Osram is using (they develop their own phosfors, right?) this is what you get.

I think 3) is not true, I have a few flashlights with old gen. SSL80 4000K 96CRI leds that have the most wonderful tint, slightly rosy with no green.

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@Chouster: Hahahaha finally you sent the little hulk to Maukka. I remember you said how green this Oslon is. Big Smile

Now I really doubts any claims about ultra High 90+ CRI until I see it myself or spectra tested. Flat Stare . Seems they can play with the numbers to get high CRI on paper. Digital camera and monitor aren’t trusty either for sharing….only film camera available at the moment.
I almost buy the CRI95/R9:90 Oslon earlier, this test has saved my wallet. I must test all of my Nichias right away Sad (worry mode: on).

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@maukka, again, thank you very much for testing.

@clemence, yes, I was very curious about the results…

@all

The first emitter I had installed in a P60 drop-in was hooked up to a dual channel driver, so that the low modes are pulsed at 350mA, that’s were the tint is the worst to my eyes. It does get better moving to PWM @ 1400mA, but I clearly prefer the 219C R9050 sm403 from clemence at any current.

I really hate the fact that this Oslon only comes up to its CRI specs (R9 especially) at very low currents. In fact, according to the datasheet you shouldn’t even drive them at that low currents (not below 200mA). Their specs are typical R9 value of 90 at 700mA, and that basically means nothing as we see here. It’s so far off from 90, that got me thinking I’ll give a $#@§ about typical values from now on.

I’d love to speak to someone from Osram about this. The LEDs have a little code on them so they could give some more information or confirm if these are really “GW CSSRM1.BM”, if they wanted.

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chouster wrote:
@maukka, again, thank you very much for testing.

The first emitter I had installed in a P60 drop-in was hooked up to a dual channel driver, so that the low modes are pulsed at 350mA, that’s were the tint is the worst to my eyes. It does get better moving to PWM @ 1400mA, but I clearly prefer the 219C R9050 sm403 from clemence at any current.

I really hate the fact that this Oslon only comes up to its CRI specs (R9 especially) at very low currents. In fact, according to the datasheet you shouldn’t even drive them at that low currents (not below 200mA). Their specs are typical R9 value of 90 at 700mA, and that basically means nothing as we see here. It’s so far off from 90, that got me thinking I’ll give a $#@§ about typical values from now on.

I’d love to speak to someone from Osram about this. The LEDs have a little code on them so they could give some more information or confirm if these are really “GW CSSRM1.BM”, if they wanted.

Try 50X loupe, just in case there’s a barcode or something near the lens. I can see some tiny numbers in Nichias
Edit: I see that you already saw the code.

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I ordered and received some of the 2nd gen. Oslon Square leds that maukka tested above (96CRI typ. R9:90), and put one in a small EDC.

I can confirm that the colour reproduction is really good with great reds, and I can also confirm that the tint is amazingly unattractive.

Btw, I compared the beam next to the beam of a flashlight with the Square led of the OP (which is ‘just’ 92CRI typ.), and next to that one, the tint looks way better, less green.

I’m in for some 219b V1 SW453 R9080 leds from clemence’s group buy, that clemence finds too rosy, perhaps a quad with a 2×2 mix of these two leds will just have the ideal tint?

chouster
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djozz wrote:

I’m in for some 219b V1 SW453 R9080 leds from clemence’s group buy, that clemence finds too rosy, perhaps a quad with a 2×2 mix of these two leds will just have the ideal tint?

That sounds like a good idea!
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just wondering why this LEDs don’t get used much

possible the lack of a proper DTP star

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