Flash on, Flash off.
Wax on, Wax Off.
Daylight comming into the room will very by the hour
I have found that daylight is what set's everything up for a picture to get personality and it is integral to what I am pursuing when shooting stills.
No hour has the same light in a day ( goes without saying), and when working with daylight you gotto understand how it can set the tone for everything.
So your answer may not be so much technical as what it is you are attempting to portray within the photo.