Nichia 219B 4500k D220 9080 CRI Emitter output test by Texas_Ace; Amazing tint and CRI! Output is what you would expect.

White means that a tint is the on the BBL. As long as the intensity of the light is matched to the CCT (see here) the human brain will get used to it and perceive such light as “white”.
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These 8T and 8Q tints are worse than what Clemence’s Nichia LEDs do (see Maukkas tests). The current Nichia 219C and 144A R9050 LEDs with the ecxeption of the 4000K (3-step 403) variant are all rather good. Many people here seem to prefer an off-white reddish/pinkish tint which seems to make colors “pop” more. The 219B-V1 sw45 and the 219C 4070e are the only LEDs here until now which garantuee such a tint.
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I also prefer such off-white tints, but only inside. Outside I only like them when my surroundings are very brownish (forest with no leaves etc.). Otherwise a bit more balanced light is more pleasing.
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The 144A 4500K R9050 in particular has a very natural tint, very close to the BBL. Unfortunately is suffers from the same problems as current Cree LEDs (the corona has a lower CCT than the hotspot and the spill).

I’m always totally puzzled by Maukka’s graphs… :person_facepalming:

You should get help :wink: ( :stuck_out_tongue: ).
Here is his thread on the topic. It makes sense to discuss details there.

First you need to decide what you want to know when looking at his measurements. Then post those questions and you will get help in finding the answers in his measurements.

Me too, but they sure are neat looking.

maukka, it may as well be possible that the way we perceive light is the actual reason for our very fine kermit discrimination tendencies. Just look how intense just about any cheap green laser looks (they may hit 0.1W) versus vastly more powerful blue ones.

On green! Nice shot! :-D

Cheers ^:)

I agree with this. Even the green lantern like Osram can be made pleasant with simple gel filter. What I’ve learnt from Lee’s LED filter is you can always trim but you can’t add. High CRI LED is a better starting point than lower one when you plan to use filters.
Maukka, do you have Lee filter swatch? I’m curious how much can we trim the blue spike in most cool white LED while keeping the rest as flat as possible.

- Clemence

Packs of Various LEE Lighting Filters - Includes Colour Magic and Music Packs

I like Lee minus green filters

I don’t understand duv, yet, but, I can see that the Greens (R3, R4, R5 and R11) are taller than the Red, Yellow, and Pink (R9, R10, R13), on the Green tinted Oslon… while on the Pink tinted Nichia the Red, Yellow and Pink bars are not shorter than the Green bars…
images clipped from maukka’s plots

looking at the relative size of the red vs green bars, I would expect all these LEDs to have a green tint

and they do: (pic is from, and is a link, to maukka’s review)

I haven’t dig too much into this but….IMHO….

Simply said Duv is how far off the tint of tested LED from the BBL (0 - 4500K) or SBL (5000 - 10000K). BTW, is there such a term as Sun Body locus? :smiley: this is just my own word.
From my understanding looking at Maukka’s chart: 0,0055 means the tint is lower than BBL while 0,0093 means the tint is higher than BBL/SBL. By carefully looking at his charts, I think it’s safe to conclude anything beyond 0,004 or 0,004 is considered too far from the reference line (BBL/SBL). This aligns very well to 219B sw45k (miss piggy tint) and Oslon (kermitt tint) facts.

- Clemence

I dont know how I missed this led… but I did… is it still available anywhere to purchase?

Link to the latest info

The reference source differs depending on the standard/method. For example the CRI standard CIE 13.3: 1995 describes the duv tolerance (i.e. acceptable duv to consider the CRI valid in the first place) as +–0.0054 with BBL being the reference source for CCTs up to 5000K and D series illuminants above it.

This is also true for CRI, CQS and CRI2012, even if the duv tolarence varies a bit.

In the TM-30-15 and CIE 224:2017 the transition from BBL to daylight illuminants is gradual.

In my data, however, duv is always the distance from the BBL, even on sources above 5000K.

I have the Lee swatch book to play with.

We’ll be very grateful to see your test results then. My personal request is how far can we trim the blue spike. Also how the minus blue spike filter affects CRI.

Many thanks
Clemence

Mauri, the CRI datas are missing

Where do you get those green filters? I have several LED’s that could use that.

Lee offered a free small swatch colour sample, it consists of hundreds of its colour gel filter. Each sample is enough for two small flashlights. Just contact your local representative marketing. I lost my colour swatch in the project site. I’ll need to order another

- Clemence

Who is Lee?

http://shop.leefiltersusa.com/Swatch-Book-Designers-Edition-SWB.htm

An actor I guess :wink:

Bruce Lee