Used Len1's parameters for "A Light In The Darkness"[link] as a starting point. I did around fifty variations trying different settings to get something that looked right. So I scrapped them for this one and decided to divide it in to pieces. This is two combined for the background and the sphere for the last render.
That's the reason I separated the sphere from the rest. Every time I got a good transparency on the sphere the the poly forms around it were too saturated with light. Too frustrating to do for hours.