If it's a sunny day, I'd leave the tungsten practicals off so that the scene looked like a daytime interior scene.
If it's an overcast day where you could logically justify someone turning on a tungsten practical and you didn't want an extreme color difference, obviously you'd either have to gel the windows... or use blue-painted tungsten bulbs or the new daylight-balanced fluroescent light bulbs in the fixture.
There are blue-dipped 250w and 500w photofloods that burn at around 4800K, so they only look slightly warm in a 5500K environment. There are some even lower-wattage bulbs that are blue, but you need a pretty strong bulb to overcome the light loss of being blue painted. Lowell now sells a daylight-balanced flo lightbulb, and other companies make a near daylight flo lightbulb that has a high CRI value (not too much green in them.) There may eventually be daylight LED bulbs that screw into ordinary Edison-base fixtures.
