Hi Bart,
can't find the spectrographs I made when I purchased them in 2019 (will provide them later), but of course they are rather "spikey", as any LED panels are. Nevertheless, their spectral output was the smoothest I could find (besides Yuji), rather stable over time, dimmable, adjustable between 3600-5300 K, with a rather high CRI of 97/98 (yes, I know, this doesn't mean anything). Panels are foldable, light and come with V-mount for accu/outdoor use.
I use them for video and repro work, using custom profiles for the Sony A7r3. So far no problems.
Godox sits in Shenzhen, China.