After multiple tries and errors in the range between 3700 and 6500k I am now sure that the true white is at no less than 6500. I do admit that 4000K is much easier on the eyes, but we are talking white here.
I am looking forward to trying 7000K and cooler tints in 95+ cri
My EDC mule is based on a combination of 3x 5000K and 3x 6500K optisolii so it should be around that high noon 5700K cct. This is a great! tint.
But the perfect one is the pure 6500K one. I am waiting for a quad mcpcb with these leds to arrive and eventually replace the above-mentioned mule
I have a 6x optisolis mule, 5700K. 3x 5000 + 3x 6500.
this is a fantastic tint but I think I prefer the 6500k. nothing has been better to me than that
in any case, the optisolis is head and shoulders above the e21a at any cct