Never thought of mixing 219Cs for a better tint. Would 4000K and 5000K be a good mixture? Can you do that with a triple, or does it need to be a quad? I don’t recall seeing anyone doing that here.
I tint mixed a Noctigon Meteor M43 WITH 219C 4000K and 5000k, 50/50 , and the resulting tint is a beautiful 4500k with no more green. I have also done it on a quad with the same results. In a triple, it will also work but may not drop your DUV as much since it won’t be 50/50 balanced. In a triple you can even try 3000k +4000k +5000k
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no
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Okay just saw this thread and trying to make sense of it. So I have from Kaidomain a 219C (4000K, CRI92) and a 219BT (4500K, CRI92). 219C was ordered 1-1/2 years ago and the 219BT was ordered last week.
So after reading this thread, the 219BT is around 1500 Lumens and the 219C is around 700 Lumens? Is this correct?
Also, which one has more intensity/throw? 219C or 219BT??
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if the 219c is D240 it makes 240 lumens, at the reference power level
if the 219b is D200, it makes 200 lumens at the same power level
which one has the tint you prefer?, which one is greener?
depends on the beam patern and power level
If you build two identical lights, you would be able to judge by shining each light on a target, and decide which one looks brighter, to your eyes.
My guess is the 219c will throw farther, simply because it produces more lumens… brighter but greener…
both the 219c and 219b are similar in dome size, there is not a big difference in the beam they produce
the more significant difference is that the 219c is Greener, and slightly brighter. But the 20% difference is not a significant visual difference, whereas the Green Tint is obvious
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In my experience mixing 219c 4000k and 5000k resulted in a neutral white that no longer required a Lee minus Green filter. It is am improved tint that is very close to the BBL compared to 4000k or 5000k on its own. There are different bins of 219c, and can’t confirm which I was using.
So although this mix in my opinion is a good mix, it won’t be as rosy or far below the BBL line like 219b. How far it deviates from the BBL is really a personal preference. The larger the gap in CCT, the lower the DUV will become, but CCT will probably drop as well. Compromise to be made.
Okay, thanks for the info and I’m starting to understand… kinda. :laughing: I know, I need to do more research on that graph output and will when I have a moment. 
Tint wise, I prefer rosier as the emitter is for my Lumintop EDC18. I’m wanting to replace the XPL HI 5000K which I like, with something warmer for the time being.
Man so many variables for the Nichia emitters. Back in the beginning, I thought okay, just grab a Nichia 219 and I’m all good to go. Then found out about all the options, tints, and numbers! Easy but not easy! 
> Tint wise, I prefer rosier
219b is rosier than 219c
however the 4000k 219c is warmer than the 4500k 219b
I personally always choose the 219b over the 219c, because rosy tint is my preference… but
4000k will be warmer and yellower than 4500k, which will look bluer
I would still choose the 4500k 219b over the 4000k 219c, because the C looks muddy, and the B looks cleaner and clearer
so 219b 4500k yes
219c 4000k no
the 4500k 219b is uniquely versatile… it is the gold standard, for me… though I confess I have a dalliance with 219b in warmer color temperatures…
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Okay, I will try the B out and compare it to the C when the B gets here as it was shipped out already. By the looks of it, I think I will like the C. Will be great because it is getting darker nowadays with Falll around the corner. 
Hi. I found that interesting thread. From charts seems most 219C are above BBL and greenish. I never thought about it in my favourite Astrolux S43 with Nichia 219C. Do you think it is possible to be 219B leds and not C? Tint is almost perfect. I don’t have spectrometer just tested them with my opple meter
IMO, minus green filters work great with 219C. Total game changer for me because I hate green tints. I don’t find the slight output reduction due to the filter to be noticeable.
that looks Very nice. thanks for posting such an informing photo
what is the calculated DUV number?
maybe… you can check by removing the optic… the LEDs look different:
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fwiw, LEDs vary in DUV, even from the same reel, so imo you are looking at a nice 219c w DUV slightly below BBL. imo it does not need any additional minus green (+pink) filter.
thanks for sharing Opple data… :+1:
I tried to remove TIR optic but it is not easy. It is so tight that I can’t pull it out. I didn’t want to broke it. Time ago I do that with my IF25A and broke one legs of it. I don’t know exactly numbers when calculate that DUV from screenshot. So I make another measurement at low level output with coordinates x=0.3491 and y=0.3505
Try to glue a tape over the optic and pull it out with care.
> coordinates x=0.3491 and y=0.3505
looks good:
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Tint DUV = –0.0022
I managed to remove the TIR optics and they are definitely Nichia 219C
Which type of minus green filter you use. I maybe want to try it with green SST20 in Sofirn IF25.
congrats
so now that you know they are 219c… I wonder if we trust the Opple DUV value, or if it might have underestimated?
also, higher output levels will have lower DUV…
here is info about Lee Filters effect on Tint DUV, thanks to maukka:
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pic is a link
note each filter lowers DUV by about –0.0040… I would suggest you use the lightest one… minus 1/8
and there is a high temperature version of the filters… the lightest is Zircon 805
Zircon 805: light transmission 86.6% (iow 13% lumen loss)
equivalent to
Lee 279 -Eighth minus green : 87.2%
With my eyes I can’t see any green tint at all so I think Oplle is accurate enough. Yes it will be best to test with spectrometer but I didn’t have. I want to have one but they are to expensive for me just to test some leds for my hobby.
without buying a spectrometer…
if you have an sw45k, and compare it to the 219c side by side, you may see a difference
and you could measure the DUV of the sw45k, for comparison reference…
In any case Im glad youre happy with the Tint of the 219c in your light, and its good that you have an opple, so you can begin to compare some of your other LEDs DUV to each other
fwiw, I just measured a light with 3000k 219c and the Opple Tint DUV came out to –0.0010…
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this suggests to me that my meter reads about 0.0020 lower than maukkas, since his 3000k 219c measured DUV 0.0007
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pic links to maukkas data
and of course, LEDs also vary
enjoy!