🚀 go-pugleaf

Kokii,

pRGB=ProPhotoRGB is an extremely large space. Use this
in ACR with 16 bits per channel (bpc) as an intermediate
color space (a transfer format).
In Photoshop you can convert the file into any other space,
for instance sRGB, aRGB=AdobeRGB, or my oRGB=OptiRGB.
The first steps of image processing, mainly levels corrections,
can or should be done with 16 bpc, but then you can continue
with saving by 8 bpc (my humble opinion, but shared by experts).

If you want to continue editing in PhS by pRGB, then you
should use 16 bpc.

These abbreviations are based on my suggestions:
sRGB = Standard RGB
aRGB = Adobe RGB (1998)
pRGB = ProPhoto RGB
oRGB = OptiRGB

Best regards --Gernot Hoffmann