Back in 2013 the game magazine Polygon created really stunning illuminations in their Playstation 4 and Xbox One reviews. It's what got my interested in the more advanced uses of SVG and CSS -- it uses a clever trick where it uses the bezier curves as paths that are then filled in by offsetting the stroke fill... here it is.
Used this same trick (but with SMIL) for an automotive client back ca. 2004. They wanted their electrical systems' documentation diagrams to be in SVG, with signals being animated in a similar fashion. At the time the only viewer that supported it was Adobe's ActiveX plugin! (Not claiming credit for the trick; AFAIR I found it on a web forum somewhere... wish I remember who invented it)
https://www.polygon.com/a/xbox-one-review#console