[ScottBurson]

I would use plasma spheres (e.g. [0], but there are lots of them out there). A single plasma sphere generates a visual display that changes much faster and is much less predictable moment-to-moment than a lava lamp -- so you wouldn't need nearly so many of them -- and uses much less power into the bargain.

[0] https://www.scientificsonline.com/product/nebula-plasma-ball