My question referred to this post
LT1 = BLF lantern
It seems not strange. The curves of equal tint have negative second derivative(in uv coordinate). The tint of mix located at the line betwin tints of separated LEDs of mix(as I understand procidure of calculating UV is linear). The more difference betwin CCT of LEDs in mix the more negative Duv.
Yup, correct. That’s why with full range of available, we can custom engineer by mixing those E21A. No longer dependent to 219B sw45k.
I’m taking another beamshots now, stay tuned….
Created a dedicated thread especially for this E21A mix: [Reference] Nichia E17A/E21A (2000K - 6500K, R9050/R9080, color) CCT and tint shots
[Clemence]
I don’t know of any suitable dual-channel driver yet for a flashlight. Something like 3 or 4 x 7135 on each channel would do it, and then it could be paired with a quadtrix in an S2+ or Skilhunt H03 behind a frosted optic, or perhaps as alternative, in a D4 body. I wouldn’t mind trading the D4’s high output for a tint-shifting option.
I would be more than happy to have nonmixing dual channel programmable driver. One channel for a daylight led the other one for night time led. But this can be achieved by using 2 regular drivers in one light
30% OFF for all 219C, 319A, and 144AM LEDs
Can be combined with normal store discount coupon code
[Clemence]
I was just thinking about order 144AM and E21A from you, but I’ve seen, that VR16S1 is now out of stock 
Could you please restock them?
Yep later altogether will all those new boards
[Clemence]
Hi Clemence, are you still planning on making this board?
If the E21a works nicely with a Carclo triple I might try putting it in the FW3A.
Better late than never: thanks, I’ve played a bit with it but it’s very complicated however it helped me figuring out some stuff.
@Clemence, any chance of restocking the d220 4000K in the newest future?
what triple optic is good for an E21A / Optosolis ?.
possible?.
these any good?;
https://www.cutter.com.au/product-category/led-optics/carclo-optics/carclo-tor-optics/page/2/
thanks.
bump. anyone?.
so cant an E21A / Optisolis be in a triple ? 10507?.
Hi Clemence, what can you tell us about the 219F and 319B leds, apart from that no high CRI versions are listed?
I will send some 3000K and 5000K (both D340 R70) to you and hopefully you can forward few fresh 219Fs to Koeff. They have been sitting in my box for almost a month. Have no time to test them.
[Clemence]
I don’t know. I don’t have any triple board yet to tell. Maybe you can find it online somewhere
[Clemence]
I can do a led test sure 
Koef has not been seen on BLF for 4 months, I will send some leds to him but he may not be into testing them at the moment?
No problem, no need to send him if that’s the case. Let’s pop them Jos
[Clemence]
I have an AT WIZARD PRO 6500k E21A from Clemence. Great Light!.
I am considering swapping for a more 5600k Daylight white.
would I be right in saying it would mean a LED mix of say maybe 6500k 5000k?.
possible ?.
worth it?.
kind thanks.