Imported into Modo, added a locator to the center of the object. Created a Gradient that drives the difuse color based on distance from locator to get rainbow effect.
step 3 of 3
Duplicated color gradient, and set to drive luminous amount based on distance from locator. I was hoping for a nice glow in the center, but that didn't achieve it. So in addition to that, I added a pin light in the center with volumetrics. I upped the value of W/srm^2 to get that blown out effect on the lighting.