Instead of blue, I connected a Spots node with red and white in it to the Diffuse_Color.

(Also I went back to one light from stage right)

The color is different but the pattern of light and dark is the same and determined by the light and the diffuse reflection effect.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)