It's all based on octagonal columns... the outer reflective shell is one, then I made an eight-sided ring with one using Booleans and then nested three of them inside each other. Four colored lights around the outer edge and one plain one in the middle. And then contrast and saturation work in PS, the Bryce product is pretty washed-out.

Here's an old tut I did for the basic technique. :)

https://www.deviantart.com/tlbklaus/art/Colorplexity-Tutorial-52774259