It is actually an orange sphere.

In the previous render, I had my light turned up really high. This resulted in hyper colors.

My orange [1, .5, 0] multiplied with my crazy hot light (intensity = 10) resulted in the hyper color [10, 5, 0]. Even in areas of the sphere which were lit less because of the angle, we still had colors like [3, 1.5, 0]. All of those look the same as [1, 1, 0] which is yellow.

Now you know why.

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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)