Nichia NV4L144/W144 AME/ARE CRI and output testing

@ Jon Slider: Great! now the chart looks even more useful

The 3000k R9050 is perfect for Incan replacement. What’s more: less eye strain due to less blues too

Soon, after Maukka send them to Djozz =)

Excellent information, thanks.

Can’t wait for the 219CT R9050 to become available.

Thanks for the thorough testing maukka.

I will try my best to do a proper voltage and light output test on a few of these, but unfortunately the timing is very bad: next week monday to friday I will be supervising a school trip to London, and the week thereafter monday to friday I’m away with the family on a short holiday. I will try to squeeze out one output test next weekend, but no promises. Serious hobby time is two and a half weeks from now :frowning:

Impressive tests!



219C and 144A


People do not give nearly enough credit to high CRI lights. Ever since trying them I can’t go back. They are just SOOOO much nicer to look at and even with less lumens you can see much better with them.

Now my big thing is tint mixing, tint mixing high CRI LED’s takes it up another level.

Actually mixing super LOW CRI LED is more fun :smiley:
You’ll never know what you’ll get. Grey could be magenta, yellow turns green, etc…
It’s like the witch and her kettle

Now there’s an interesting idea.

Has anyone done tests like the ones maukka did in this thread, but with a tint-mixed light? Perhaps one each of 5700K, 5000K, 4500K & 3000K, all 90+ CRI, on a quad MCPCB and diffused together into the CRI testing equipment?

I have not seen any testing like this but would love to. Some 90+ CRI 3000k + ~5700k 90+ CRI would be quite interesting.

To my eyes it is richer then a plain ~4500k 90+ and has more contrast but I don’t really have any directly comparable setups.

I do not see how a tint mixed light consisting of high CRI leds of various colour temperatures would emit a noticably different (better, closer to 100CRI) spectrum than one high CRI led in the averaged tint. Of course it is fun to make a mixed light (my S41 has two 5000K and two 3000K 219C’s), but I would not expect something special new, the resulting spectrum is a simple add-up of the separate spectra of the leds.
As maukka mentioned, mixing several low CRI leds can have an interesting and possibly high CRI result, but if you already use high CRI leds, the CRI difference between separate leds and the resulting mixed spectrum will become much lower. No miracles are happening in light spectra.

Not miracles by any means but to my eyes it is more contrasty then a single tint high CRI LED.

That said I don’t have a multi-emitter high CRI light in a single tint to compare so it is hard to say for sure.

It is kind of like HDR imaging, you are able to artificially increase the contrast and vibrancy above that which is normally possible.

But then all of this is why I would love to see some real world testing on it to see what the actual differences are.

My kitchen lamp, which I inexpensively retrofitted with two of these Markerled 10W warm white 5730 lamp boards, plus a single “18-36W” driver (300mA, 18-36 led/ledpacks in series) driving a couple of 30S2P cool white 5730 arrays in parallel (so ≈150mA of current flowing through each array, 75mA/emitter), actually displays quite a nice tint, warmer than daylight (phone's pics look slightly warmer when taken under the lamp with “daylight” white balance), and CRI is, to my naked eye (and my friend's one too) noticeably better than the one from a cool white XM-L2.

My ¢2.

Cheers ^:)

Yup, I think so too. CRI can’t be combined like CCT or lumen. There has to be proper mix/rato between each spectrum’s for a particular CCT and CRI. My thinking goes like this, For example: simply add a 6500K cool white and 2700K super warm “normal” LED would result in approximately 4600K with worse CRI than before because now the 480nm spectrum region curve would be even deeper in contrast to those to the left and right scale.

Most high CRI normal LED’s spectral curves are very different from the true high CRI LEDs like Yuji, Ledengin, Nichia, Citizen (vivid), etc… They have fatter than average curve in the 480nm and yellow - red zone. Adding several LED like these would result in less CRI rating decrease compared to the skinny curved high CRI LED.

Note: This is just my thinking, not really sure until someone publish a valid test.

Put the CRI aside, the mixed results is indeed interesting and perceived differently depends on each set of individual eyes :partying_face:


thank you for those excellent beamshots! They are perfect for demonstrating what high-cri really means because you used two cool white LEDs and didn’t move the camera at all. It’s a very obvious difference.

I think tint-mixing can have some effect if one combines warm white and cool white high-cri LEDs. Cool whites have more blue and more cyan (most LEDs produce very little cyan) and warm-white LEDs produce more red light. It would make a lot of sense to use a warm-white LED that produces a lot deep red light (the other area of the spectrum that most LEDs are not good at). Doing this should result in a more balanced spectrum, but with too much green and yellow (both LEDs would emit a lot of this).

Another way of doing things might be to use a triple optic and combine one high powered cool-white high-cri LED with one cyan and one deep red led (with less power). This would basically make the spectrum more even without adding more yellow and green light.

Thanks for your testing maukka!
That 219C 3000K tested great, Ra (94), R9 (70) at only 700mA.

The higher you push the Nichia the greater the CRI.
Where can one purchase these 219C 3000K? I’m looking for 3.

Updated the comparisons:

Very nice! :wink:

144A 4500K R9050 1A current

I would generally agree. I have mixed 219C 4k 9050 in pairs with XP-G3 4 and 5 bin hi cri and I really like the results. Visually there seems to be more contrast.