Not sure one example makes best practice though, or even a recommendation.I'd like to mention though that the last post production studio I worked at had a grading suite next door to my studio... with a dark room, no bias lighting.
SMPTE2080-3 does define a reference critical viewing environment, and a significant level of bias lighting features within. This is widely adopted in industry, including by giants such as Netflix.
Color Critical Display Calibration Guidelines
Skip to Translations Color Grading: Calibration Guidelines Calibration Targets SDR Reference Monitor (Minimum Requirements): Color Gamut: Rec.709 White Point: D65 EOTF: BT.1886 (Gamma 2.4) Black L...
partnerhelp.netflixstudios.com