LED test / review - YLX N3535B cool white - round-die LED with high luminance for 3535 footprint, but very green

djozz · 2023-11-13T20:29:08.870Z

Thanks for the test! It is close to a very nice led for flashlights. The “Yinding5050” nowadays comes in a fairly nice 3000K tint, so maybe this one also. If you can find it of course

koef3 · 2023-11-13T20:34:04.633Z

djozz:

The “Yinding5050” nowadays comes in a fairly nice 3000K tint

The real manufacturer of “Yinding 5050” is still unknown, maybe it is ‘Lumenpioneer’, but who knows…

The 3000 K of the ‘LMP W5050SQ3’ I tested recently are only in low CRI 70, which is also visible on colors, especially if a comparison (high CRI) in same CCT is available.

I think the round-die LED chips are really nice, but since they are only available in Chinese LEDs with extreme disclosure and mysterious background I cannot really recommend them (but they are not easily available so it doesn’t matter)

Sirstinky · 2023-11-14T00:12:50.389Z

Thanks for sharing. Good LED for a compact thrower, and should be good for a buck or FET driver. This is my experience with the Chinese LEDs coming from Sanan-luck of the draw on tint. Some have been okay, some really -duv, some really +duv. One of the greenest I’ve seen was the round die Lumengin in the Nitecore MH40S. There’s no predicting what you get.

1stein · 2023-11-15T16:22:14.962Z

20231115_1700271920×2560 384 KB

My precious…

koef3 · 2023-11-15T16:48:04.885Z

High CRI? Tell me more

1stein · 2023-11-15T17:50:05.741Z

Yes
CRI 101

But I’ll surely check it against my Opple3 once installed

koef3 · 2023-11-15T18:01:05.462Z

1stein:

CRI 101

You forgot the minus

1stein · 2023-11-15T18:18:38.101Z

LED tester:

You forgot the minus

No, it’s binary

QReciprocity42 · 2024-01-13T21:39:15.892Z

Found this LED that looks a lot like the YLX with the glass covering, but with a square and smaller (eyeballing 1mm^2) LES. Super cheap too at $0.6 each, wonder if it might have similar performance.

koef3 · 2024-01-13T22:17:11.218Z

Looks like a Osram LE UW Q8WP… especially for the 15 W variant

QReciprocity42 · 2024-01-13T22:19:57.830Z

Nice catch! You have tested the Osram, and the luminance was good, with issues being off-center LES and low efficiency. Don’t know about efficiency on this one but at least the die is centered.

koef3 · 2024-01-13T23:22:46.047Z

efficacy ≠ efficiency:

Nice catch! You have tested the Osram, and the luminance was good, with issues being off-center LES and low efficiency. Don’t know about efficiency on this one but at least the die is centered.

I would test this emitter, but it cannot be sent to Germany unfortunately.

1stein · 2024-01-14T07:00:13.714Z

LED tester:

but it cannot be sent to Germany unfortunately

No worries, just ordered a few. I’ll share 2pcs with you

TUIG101 · 2024-01-14T14:45:03.005Z

Did you also get the 5W version? It also seems to handle a lot of current, based on the massive bond wires quantity.

1stein · 2024-01-14T15:24:20.369Z

Nope. Only 15W.

koef3 · 2024-01-14T15:44:31.389Z

Tbh the 5W version would be more interesting due to classic lateral chip and very small LES. But maybe the 15 W version is also good for throwers (if the luminance is high)

koef3 · 2024-02-25T22:47:36.359Z

I got the 5 W version of this unknown emitter recently. The problem is… it is not white, but lime green. No joke, it has duv over 0,042 and has a spectrum quite similar to PC Lime emitters. Seems like the seller mixed it up with white since the phosphor and color of LES looks more or less the same, even under UV 365 nm light…

If I get some reference LEDs for PC Lime I will test these weird green emitters. Tbf this green looks quite nice, not like vomit stuff from Luminus/Sanan

QReciprocity42 · 2024-02-26T02:08:41.770Z

Oof, that’s tough. I don’t know of a proper lime-green source (especially high intensity), but maybe the figures would be comparable with the Osram PC green, which has been tested by djozz. I would like to see what sort of output readings you are getting for this!

1stein · 2024-02-26T05:39:56.408Z

LED tester:

But maybe the 15 W version is also good for throwers

Didn’t do any measurements but it seems to be lacking luminance (C8 3.5A) comparing to Osrams or even SFT-12. But let’s wait for the test results.

koef3 · 2024-02-26T06:44:39.897Z

I discovered this too. The luminance is quite low, maybe due to sideways emitted light (this problem had the Q8WP as well).
It already maxes out at around 6 Amps, with luminance of around 130 cd/mm². The Q8WP reaches over 250 cd/mm², mostly due to much higher light flux and current.

Also the beam is not great, it is basically impossible to get a good light pattern done with Convoy C8 SMO reflector. For Q8WP it was no problem to get a nice spot, only the corona looks like some sort of ‘eye’.