[GB ended,discussion only] CRI > 80+ NICHIA 2000K-6500K [E21A/219B/219C/319A/144A/757GT-F1(Optisolis)]

I did my first mod with the E21A sm603 R9080, and it makes me like cool white tints much much more :slight_smile:

The Optisolis…

- Clemence

Very curious about these

Have you tried mixing them with 5k?

No, I just have the 6500K ones.
And mixing leds is a bit of a believing thing, not real. For me it would only be useful to obtain a colour temperature that is not available, so out of shortage of supply. If you mix two colour temperatures, the spectra simply add up and you have no different tint than if you use just one led of the in-between colour temperature, but not as good because the light will not be perfectly mixed.

Correct! Mixing several different CCTs will also (in most cases) results in lower CRI than individual CCT. You can check Maukka’s test to see it. It’s more like a trick.

- Clemence

Of course you are right. My goal is to get the high noon tint of 5700K by mixing the 5K and 6.5K. Re the imperfect blend: I want just a mule and I am sure that for this specific quad board with the LEDs positioned so closely to each other, the two tints would blend perfectly when the light is more than a few centimeters away from a target.

That sounds a good reason and a good way to mix the leds :slight_smile:

Sorry guys, I’ll try to stock more CCT later. The VR16SP4 was designed for CCT switching (Warm/Cool option in a room), not mixing in the first place, to compete in general lighting applications. But later found that it’s a perfect little board for tint/CCT mixing too. The ideal solution is of course to use fixed CCT.

- Clemence

UPDATE 180217:
Very limited samples available for purchase at minimum cost only (freight & duty tax)

https://www.virence.com/blank-rwrlr/copy-of-nf2w757gt-f1
https://www.virence.com/blank-rwrlr/nf2w757gt-f1

- Clemence

That is what I’d love to have in an aleph type LE. But programmable drivers are unavailable. Just got those multi-color driver that djozz modded the other day, will see how this quad setup works with this driver.

Do you think you could install them onto a quad board? I’d like to have one with 4x of 5K

Sorry, I only have the 3000K and 5000K samples. No, it doesn’t fit the VR16SP4 MCPCB, only on the VR16S1 (offset). Being a low power LED, you can use almost any decent two pads non DTP boards

- Clemence

I see, I just wanted to put four 5K LEDs on one board to get 200+ lm from a single LE. I am just wondering now if there are any triple or quad 2-pad boards…

Sorry if that’s already said, but from the optisolis pictures, you can even see two separate dies

Yes, far from the ideal flashlight type of light source, but maybe good for a, not so bright, flood light.

Optisolis = asymmetric
Asymmetric pads, asymmetric dies placement, and asymmetric blue pumps too

- Clemence

There’s one possibly positive thing about mixing CCTs though. If you happen to get two mildly greenish emitters with large enough CCT gap, you can mix them and land closer to the BBL since the average is completely linear.

Ra/R9 of 95/85 minimum is pretty exciting, though that emitter doesn’t look good for flashlights. A panel with 200 of them would be fun, much like the Viltrox camera lights.

I wonder how does a board in those cheap cob lights look like? Whether it would accomodate a string of these nichias?