L50 (YINDING) found out to be 6000K 95CRI

1stein · November 1, 2023, 6:11pm

Recently I’ve built 2 Convoys C8+ with L50 6500K (transparent housing). I was curious if 8A would finally burn it. Simon says for the white housing L50 8A was too much.

Everything went well. L50 with transparent housing withstands 8A and judging by the color temperature raise this may be about the sweet spot. Although probably 8A is not the best efficiency you can get from it.

Going to the bottom… I wanted to check colour temperature change. Then I found out this is CRI 95 light. I thought I’m doing something wrong… Did it again in absolute darkness, on different power levels, on different pieces… Did everything to be sure this is not a mistake.

And my only conclusion is this is really 95 CRI led with great cold light which is quite uniqe IMO.

This is what I’ve had in both C8 (5500K ordered) Link

I wonder how is that possible this led is not advertised as 95 CRI. By mistake? I don’t understand.

Best if someone with better knowledge and gear could confirm it. It’s seems too odd to think the seller wasn’t aware of what he sells

These are the numbers I’ve written down during testing

Power - Ra - CCT (OPPLE 3)

C8+ (sample 1)
0,1% - 96,4 - 6065K
1% - 96,5 - 5988K
10% - 96,5 - 5940K
30% - 94,7 - 6035K
100% - 93,5 - 6508K

C8+ (sample 2)
0,1% - 96,1 - 6093K
1% - 96,0 - 6134K
10% - 95,5 - 6103K
30% - 94,4 - 6219K
100% - 93,6 - 6786K

LED picture

ControlTheController · November 1, 2023, 8:47pm

Interesting find!

Looks like the specs of the Yinding 5050 emitters are all over the place. Different packages, different tints and even same emitter configurations having different CRIs.

The other day I was looking at a ~4000K “glass type” 5050, the seller says it is 75 CRI. At this point I don’t know who to trust…

koef3 · November 1, 2023, 9:01pm

From this shop I ordered the Yinding glass 5050 in cool white some months before. And these were 70 CRI versions, as expected.

I am pretty sure that “Yinding” is just a placeholder. Some say, these emitters are from “Lumenpioneer”, other say these emitters are from another manufacturer.

Since the chinese seller/manufacturer giving almost no information about any emitters (maybe also for political reasons, I don’t know) these emitters aren’t really interesting for me. I am curios for the performance, so I test them, but I never considered to use one of these emitters in any light.

QReciprocity42 · November 1, 2023, 11:59pm

This sounds pretty crazy, how is the output and intensity compared to low-CRI thrower LEDs you have? If this 95CRI emitter is in the same league in terms of output, it would be a huge deal and have interesting implications.

Simon_Mao · November 2, 2023, 12:40am

Previously I tested several LEDs and I used 8A driver.Some burn, and some don’t.
So that’s why I don’t recommend 8A for it.

Jeffgoldblum · November 2, 2023, 2:05pm

I spent a bunch of time going through taobao with google translate trying to see if I could find any new info there on there, but nothing concrete. Here’s what I’ve got. And I don’t speak any chinese so all of this could be wrong.

Most sellers call this a Sanan 72mil or a Sanan 5050, and then something along the lines of what translates to “laser lamp bead”.
Ceramic and white glue/epoxy/glaze are words that get thrown in sometimes. Which kinda makes sense to me after reflowing some they do kind of come apart like it’s just dry epoxy if you aren’t careful. But google also keeps translating “Cree”, in English, to “Believe”. So who knows. Here’s some of those. I would just link to the pages but taobao doesn’t work like a normal website.

The catch is I’ve noticed sellers seem to call everything Sanan. Is like the default brand to describe every made in china emitter in the way everything on amazon is a Cree. But maybe they really are Sanan, they are like the biggest LED manufacturer over there. Or maybe Sanan sells the chips everyone uses? Or maybe that’s just what google keeps translating to. Literally I have no idea.

Not everyone calls them Sanan. Here’s one that shows two versions. They call one an LMP and google calls the other zhaoqi, which is a word, and they give it a higher current

And these guys use Sanan for two versions and Jingneng for the third.

And theres another Jingneng one

Here’s the L70 hi called a Jingneng 120mil. Sanan 120mil also comes up.

And these guys call it something else entirely

So that’s where I’m at… Hope thats clears things up lol

Oh and here’s something that isn’t related but that I thought was hilarious. Customer support is different over there lol

TUIG101 · November 2, 2023, 3:52pm

Two more odd specimens for the list:

6070 round LEDs (big and small LES)

5050 domed round LED

The dies might be manufactured by Sanan but maybe there’s other companies mounting these dies in all sort of packages (but not 3535 ). I’m waiting for the 3535 high CRI version, if it ever comes around, should be perfect for TIR optics.

koef3 · November 2, 2023, 4:08pm

There is a round-die 3535 variant around (“YLX N3535B”). Maybe another LED chip type from Sanan. It seems, there is a ‘round LED chip family’ around, with small (3535), bigger (5050) and very big chip (7070 and bigger).

FYI: Luminus is 100 % subsidiary of Sanan. So far I can see, Luminus did not have own R&D so I assume they will use Sanan LED chips for their products.
I have to of these N3535B LEDs as samples from a Wurkkos TS12 for testing. One of them has a very pleasant rosy tint for cool white, but no 90 CRI+ so far I can see.

ControlTheController · November 2, 2023, 4:28pm

I have also looked around on Taobao. Many of the shops just say “cool white” or “warm white” without stating the CCT, so I asked a few of them.

I have found options ranging from very low CCT to cool white. Some interesting options are 2000K 80 CRI, 3000K 60-70 CRI, 3800-4500K 75 CRI. One shop also offers 2 versions of cool white (7000-8000K), Ra 70 and Ra 90, seems that they can also do custom orders for other CCTs (300 pieces).

The manufacturer, current, CCT and CRI are all over the place, some shops state a specific CCT, some shops state a CCT range.

They all have one thing in common, the circular emitting surface. But still, there is no good way to consistently source the same LED.

TUIG101 · November 2, 2023, 4:36pm

Didn’t know the TS12 uses a 3535 LED, i thought it were the standard 5050 round LED. It will be a perfect fit for my single LED TiTS10.

TUIG101 · November 2, 2023, 6:48pm

Hoping that there’s more of these in stock. Can you describe how was the tint at low current?

koef3 · November 2, 2023, 9:23pm

No, it is a variant in 3535 package with smaller LES. (roughly 1 to 1.5 mm² estimated)
First light flux test of this ‘YLX N3535B’ LED is extremely promising, it could give an extremely high luminance. Around 1400 lumens are possible with this small LED, it maxed out at almost 10 Amps. The luminance could be higher than with Osram Black Flat HWQP or also CSLPM1.TG

Simon_Mao · November 3, 2023, 1:04am

SANAN, The Chinese name is “三安",
SANAN Optoelectronics is engaged in the R&D, manufacturing, and sapphire for use in compound semiconductor epitaxy, chips, and devices.

jojie · November 3, 2023, 1:30am

what is better in terms of cr1 sanan or jeneng?

smurcod · November 3, 2023, 3:33am

The 5500k version does have a substantially lower output, that matches up with other manufacturer’s high CRI LED’s. I was looking at ordering one in that color temp but was put off by the lower output, the high CRI might explain it.

See below:

koef3 · November 3, 2023, 6:11am

Around 250 cd/mm² for ‘YLX N3535B’

1stein · November 3, 2023, 8:49am

Wooow. I’ve tried to Google Sanan YLX N3535B, but no luck at all.

Btw. So you think these all round LES diodes could be from the same factory?
I remember of Nitecore MH12 PRO which uses diode which seems to look identical to glass YINDING but they call it UHi family.

I wouldn’t be surprised if at the end of the day it turned out this is same place of production.
I just can’t believe raising LED factory is so cheap and quick so they pop up in China like mushrooms after the rain

koef3 · November 3, 2023, 8:56am

Yes, I think so, at least for the LED chips.

You already wrote it: it is quite expensive to set up a whole fab for semiconductors (and it needs also a lot of knowledge and specialised staff), especially in this quality. These round-die LED chips seems to be quite efficient and some sort of random small factory couldn’t produce them in sufficient quantity and quality. For maximum profit the yield has to be as high as possible.

The assembling of the LED itself (soldering on substrate, mixing the right phosphor, molding the silicone, binning) on the other hand could be done by some small companies because they don’t need high-tech machinery like for production of LED chips.

What company is behind ‘YLX’ is unknown to me. Somewhere here in BLF Simon wrote that ‘Yinding’ is just a reseller of complete LEDs. I wouldn’t be surprised if all of these LEDs (glass 5050, egg-yolk 5050, N3535B, UHi, L50) came from same factory like Sanan.

lfb · November 3, 2023, 8:35pm

Hi Simon. Could you please post a spectrophotometer measurement of the cool white round die emitter that you have?

lfb · November 3, 2023, 9:10pm

The die picture from YinDing page indeed looks like a high CRI emitter. But I’ve seen some glass ones with a pretty green phosphor and green tint. So it looks like a lottery.