Here is a demonstration using the inverse square falloff pointlight.

I put two point lights 80 inches above the ground here.

The ground has a diffuse-only GC shader. (Raises the output of diffuse to the power 1/2.2). The color is white. The diffuse value is 1.

So directly under the light, at 80 inches, the falloff multipiler is exactly 1. Farther from that it goes down.

The light on the left has the sRGB color in it as usual. I used RGB(255, 128, 64). This is supposed to be a strongly saturation orange and that's how it looks on the color picker. You may think that 255/64 (saturation ratio) is not strong (high) but remember that the 64 is actually much less than 64 in linear value terms. It is 64 ** 2.2, which is a linear 12. The saturation ratio is actually 21 to 1, even though the sRGB numbers are only 4 to 1.

The light on the right has the the gamma corrected RGB(255, 128, 64) ** 2.2 value in it.

Which one is lighting my ground with the color I picked on the color picker?

---

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)