Then you have mixed lighting conditions. Lighting is mixed when you have more then one source of light, and you sources have different colour temperatures.
Very rarely you happen to shoot in any other conditions than mixed. Strongly speaking, using just one light inside of isolated room with all the windows closed, still puts you in the situation of mixed light. Why? Because all the objects in the room, including walls and ceiling, reflect and absorb the light. In a sense every object becomes a light source with its own characteristics, such as colour temperature, brightness, harshness, etc.
Another situation, and much more difficult to deal with, is when you are shooting in the room with large windows and the ceiling lights on. The windows let the daylight (5600K) go through and the ceiling lights throw 3200K flow. Is it “indoor” situation? Not really. Since we have prevailing daylight, it looks like a daylight condition. If you are using the camera with colour temperature presets you might want to set it to daylight. At list when you are shooting next to the window, set it to “daylight”. When you step away from the window, make an evaluation, how much the lighting has changed.
Read amusing article about synthetic lighting.
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