Nichia 219C D260 9050 90+ CRI Emitter output test by Texas_Ace

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djozz
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CheapThrills wrote:
Just ordered 2 219C 80CRI leds from mountain electronics.
Are these 90CRI versions available somewhere?

Rey (WWEFANS) had a full reel of 90CRI 4000K 219C leds and sold them via PM, but I believe he is sold out atm. Then there is a sale thread by clemence for several types of 90 CRI 219C’s, round 1 and round 2 is finished, but there will be a new round (and new thread) one of these days.
sac02
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I tried to buy some more of them from Rey a couple days ago and got the bad news (sold out). Crying

They’re really nice and I want to put them in everything it seems…

Lexel
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Why not order from KD
http://www.kaidomain.com/p/S026299.Nichia-NVSL219C-R9050-D240-4000k-CRI92-LED-Emitter

On triple they are cheaper
http://www.kaidomain.com/p/S026302.Triple-Nichia-219C-Neutral-White-4000...LED-Emitter-with-20mm-x-1mm-DTP-Copper-MCPCB-w-optics

CheapThrills
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Lexel wrote:
Why not order from KD
http://www.kaidomain.com/p/S026299.Nichia-NVSL219C-R9050-D240-4000k-CRI92-LED-Emitter

On triple they are cheaper
http://www.kaidomain.com/p/S026302.Triple-Nichia-219C-Neutral-White-4000...LED-Emitter-with-20mm-x-1mm-DTP-Copper-MCPCB-w-optics

I think now that I should have asked before I made order since for 10USD of LEDs there was about 14USD of shipping.
Asked for cancel and naturally after 10min of sending the mail got confirmation of “shipped” Grad

ANYWAY:
They are 80+ and 5000K which I think I like more than 4000K but cannot say for sure yet, so I´m ordering couple from Kai also

zak.wilson
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Pavlo wrote:
Anybody build a triple 219C yet?

Many people. It’s one of the options for the mtnelectronics triples when they’re in stock. Here’s mine with the 80 CRI 5000K D280 and a mtnelectronics FET+1 driver. It can run on max for about 90 seconds before it’s too hot to hold and powers on at over 3000 lumens according to my integrating shoebox and smartphone lux meter.

That’s not my only direct-drive 219C. I put one from the first batch of 90 CRI 4000K D240 in an Astrolux E02. This light is definitely direct-drive, but it uses much smaller FETs than the mtnelectronics drivers. The integrating shoebox reads 1100lm for this one.

Ceilingbounce – flashlight testing and runtime graphs for Android

Lyyyyghtey
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zak.wilson wrote:
The integrating shoebox reads 1100lm for this one.

I like that idea, a shoebox. I suppose you could get decent results from any sufficiently reflective and spherical-ish cavity once calibrated. I think I want to build an integrating yard frog, I just need to find the right product to mod.

In the meantime I need to get some of these Nichias. They sound most awesome as is, but does anyone know if a R9080 version is available anywhere yet? I’m a deep-red-rich-LED-junkie tint snob.

Thanks!

mitsuki08
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Can someone enlighten me on what the Dxxx means on the nichia leds mean? I checked the datasheet and I didn’t get much out of it. Apologies for such a noob question

Agro
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This is an indication of output.

LED production process leads to inconsistent results. Some emitters turn out better than the others.
So manufacturers test each and every LED for several parameters (voltage, output, colour) and group similar ones into bins.

Dxxx is output bin.
The manufacturer measures LED’s output under certain conditions. The conditions vary from manufacturer to manufacturer and from LED model to LED model so you can’t use them directly to compare different LED models unless you verify that the test procedure (most importantly: temperature and current) matches.
But you can use that to roughly tell how much output you lose by going with less than the most efficient bin.
F.e. D240 means 240-260 lm under test condition. D200 is 200-220. So by going with D200 you arrive at about 210/250 = 84% of the original output. So a 1000 lm light that uses D240 LEDs will produce about 840 with D200.

Note that this is very rough and other factors (like voltage bin) may affect the output.

mitsuki08
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Agro wrote:
This is an indication of output.

LED production process leads to inconsistent results. Some emitters turn out better than the others.
So manufacturers test each and every LED for several parameters (voltage, output, colour) and group similar ones into bins.

Dxxx is output bin.
The manufacturer measures LED’s output under certain conditions. The conditions vary from manufacturer to manufacturer and from LED model to LED model so you can’t use them directly to compare different LED models unless you verify that the test procedure (most importantly: temperature and current) matches.
But you can use that to roughly tell how much output you lose by going with less than the most efficient bin.
F.e. D240 means 240-260 lm under test condition. D200 is 200-220. So by going with D200 you arrive at about 210/250 = 84% of the original output. So a 1000 lm light that uses D240 LEDs will produce about 840 with D200.

Note that this is very rough and other factors (like voltage bin) may affect the output.

I see. Thanks for the detailed response! The Nichia datasheet was confusing being used to looking at a Cree datasheet. But yeah I can interpret it better now with your explanation.

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