10000 K and 90 CRI reminds me of some 5 mm LEDs with ugly cold white but spectrum with high color rendition… these are pretty bad in terms of blue tint, but have surprisingly good tint. I have one of them in an old RAVPower powerbank, with over 27000 K (!!) but 83 CRI with R9 35.
This LED is not exactly the same as this “Yinding 5050 95 CRI”, because of the phosphor color and how the LED chip was covered with it…
Is this a bare emitter measurement or through a secondary optic/reflector? Bare emitter measurements will always err with lower duv and CRI, and higher CCT, due to angular tint shift that makes frontal emission blue/pink.
EDIT: it’s probably through a reflector as your image shows. Hmmm that is weird, and idk what to say. Though at the extreme high end it doesn’t take much change in color to change the CCT by a huge amount: looking at the blackbody line on the CIE chromaticity diagram, infinite CCT is only a finite distance away. In light of this, the exact numerical value of extremely high measurements cannot be relied on–they are more of an order-of-magnitude estimate.
Thank you for clarifying! A measurement through an aspheric would also tend to the high CCT, low duv + CRI side because the lens only collects frontal emission, not sideways emission. It would be amazing if you could do the measurement through a conventional reflector! That is usually more representative of the overall color of an LED.