They don’t specify CRI, only say that it’s high which makes me unconvinced. Also, are they high CRI all over the spectrum or only at one certain CCT?
I wonder what is the common construction style of this kind of bulbs.
If the bulb is technically RGBWW with 2 separate white LED CCTs and the white LEDs themselves are high CRI, the bulb is going to be high CRI at the CCTs used by the white LEDs. But may not be high CRI at any other CCT because mixing colours tends to reduce CRI (here’s a more detailed explanation).
If it’s RGBW with a single high CRI white LED CCT, it may still change CCT by mixing-in RGB light which is going to be terrible for CRI. They would still be able to label the bulb as being high CRI, but that would be true only at one specific CCT, elsewhere things would be bad.
They could also be pure RGB. CRI would be terrible everywhere and any claim of it being high would be a lie. But I’ve seen lies that are easier to verify than this one. I actually doubt that this kind of construction is common…but I wouldn’t be surprised if these existed.