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.
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.
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.
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.
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
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…
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.
The actual spectrum of any “white” LED is a strong peak in the blue, a dead zone around teal/bluegreen, and then a slow rise towards the yellow/orange, then falloff in the red.
If you were to combine the 2 individual spectra of, say, 4000K and 6000K, it wouldn’t exactly equal the spectrum of a 5000K LED. Being that cooler lights are generally a little more efficient, you’d be able to guesstimate its combined CCT to maybe 5100K instead, but the balance of all the individual colors wouldn’t be identical, even if you were to have a 5100K LED.
It’ll likely be close, but not exact. And the result can be a lower CRI if they’re not “in balance”.
The Optisolis is currently still under preparation to hit the market. It’s light quality is simply Nichia’s best to date. Far better than E21A 9080.
I made a spectrum comparison pictures in the product page, please check it.
But….It’s a very low power LED rated for only 0,3 watt per LED.