Unfortunately, there isn't really a way for a consumer to know short of buying a spectrometer like my Sekonic C-800 Spectromaster.
For illustration, I have uploaded a few readings here, mostly flashlights, not LED bulbs: https://majid.info/images/reddit/spectro/
If you look at the Zebralight SC64c LE, for instance, it has an excellent Ra of 92, but only 75 for R9:
https://majid.info/images/reddit/spectro/ZL_SC64cLE/SC64cLE_...