hey again @FrankS ,
it seems indeed to have a input issue with the existing elements, as just xyz are from 0To100 or 0To1.
I was a bit bored and took the time to write a converter (two in fact) for the Cie D65 2° standard to sRGB, checked with online converters (@inno , thanks), whether my elements work correctly and they do, so here you go:
CieLab2sRGB.gh (7.4 KB)
hope that’s a good workaround for you
Ben