Do you have my light meter? It's always good to use it when messing with lighting.

Now that I have correctly set my Gamma In and Gamma Out to 1.0, with render GC at 2.2, my HSV Value is 2.08 producing the equivalent light when I mistakenly suggested 5.

I used the light meter to verify that shader gamma=1.0 and hsV=2.08 is the same light level as shader gamma=2.2 and hsV=5.

And as you can see by the meter, that is near-perfect lighting.

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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)