Hi, so here's the scernario:
You're in a studio, you're shooting on tungsten and you have two sources. One is a practical and the other is a tungsten studio light shining through a window replicating daylight. Should the studio light be a slightly cooler temp than the practical? Another words, will people sense something wrong if an interior and exterior are lit with the same color temperature? Thank in advance.
In theory, the daylight should be cooler than the tungsten practical in the scene, but in practice, people shooting on soundstages under tungsten illumination often let the two types of light be the same color, although in most daytime situations, the practical should be off anyway to signify that it is day scene and not a night scene.
I've sometimes put a bright bulb in the practical and then dimmed it for a warm effect so that it looks much warmer than the tungsten daylight on stage.
"The Terminal" had the giant airport terminal set lit with HMI's precisely because Kaminsky felt it would look like they were on a stage set if tungsten bulbs in practicals were the same color temp as the daylight.
However, the truth is that our eyes correct for some of the color temp mismatch more than film does (being literal) so I don't think to match our own perception that the difference has to be as extreme as 3200K versus 5500K -- all that matters is that the practical feel warmer than the daylight. But the daylight doesn't have to be full blue or the practical have to be full orange in order to look realistic.