it would be great to add a light cube to the vray lights section-
vray light mesh doesnt always behave as it “should” and a cube (or procedural rectangular object) would be great to have as a new vray light!
I guess creating 6 VrayLights and scale them with a dummy would not be the solution?
It’s a bit of a setup, but you could create that one time and re-use it when you need it.
I guess a VrayLightCube could be a the answer 
+1 neat idea, I have tried 3LP’s method, but this would still save time, especially over many projects…
would a sphere light not do a similar thing?
in some cases, sure, but others, no…at least not in my attempts. I would usually use it mostly for certain rectilinear shaped light fixtures.