Matching White Balances
People often assume that the goal is to match the white balance between different displays and viewing light sources. For side-by-side comparison this can help, but what people tend to forget is that their eyes are constantly compensating and can accommodate changes in white balance from one light source to another. You can edit an image on a display using a white point of 7000 K and check the results with a viewing box that has a white balance of 5500 K, as long as the two are a short distance apart. In these situations, your eyes will adjust to analyze the colors relative to what they perceive to be the whitest white.