I need to light a scene, but not affect the fall off of a spot light in the scene. But it seems no matter where I place it or what the strength of t either the spot or radial light is, the falloff always changes. Is there anyway around this?

Can you be a bit more specific? I just don;t quite get what you are trying to do. What is different between the first and second pics?

There's an option in the light lab for different types of fall off, select none.

To be a little more specific, set the radial light's fall off to none, then set the volume light ( spot light ) to range fall off, then set the range of the fall off using the slider. Also set your spot light ( the volume light ) to infinite light. The range of the color, the volume light projects, can be set using the gradient option and setting the gradient range and offset.

If you notice in the picture on the left, without a radial light to light the "scene", the spotlight above it "fades out" long before the end of the picture. The picture on the right shows that if I wanted to light the "scene" with a radial light so I can see the foreground, the spotlight above it does not fade out before the pictures edge. Both spotlight are exactly the same settings and both are infinite lights. But the radial light seems to affect the brightness of the spotlight. Is there anyway I can turn off "recieve light" options for spotlights? (Im trying, but its hard to explain it, sorry about the misunderstanding)

If I understand the original question: When you make a visible, volumetric light, you are making the light itself into a "real" object, so that the radial light can affect it, just as it does the other visible objects in your scene, like the squashed cube and plane in the image at the top of this thread. Although you can change the look of this by adjusting the "edge softness" or intensity of the spotlight, I'm not sure you can get the exact effect you are after. Hope this helps.

Or you could make the volumetric radial much, much bigger. That might help achieve the effect without being so visible... I mean, fill the scene with it instead of having it be so small. Just an idea!