When you walk from outside, which is illuminated by sunlight, to inside, which is illuminated by "tungsten" illumination, your perception of colors...

1. When you walk from outside, which is illuminated by sunlight, to inside, which is illuminated by "tungsten" illumination, your perception of colors remains fairly constant.But under some illuminations, such as street lights called "sodium - vapor" lights that sometimes illuminates highways or parking lots, colors do seem to change.Why do you think collar consistency would hold under some illuminations, but not others?

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