V-Ray Softbox texture on area light alphas- what's the right way?

[GidPDX]

To get it so lights will shine through each other, do we set Alpha from intensity to Color intensity/luminance or use the alpha channel on the gradients for things like the vignettes?

It seems to work with the Alpha intensity set to Color intensity/luminance but the only thing changing the alpha in the actual vignette seems to do is effect the color/choke it.