Saw some fantastic lighting while in London a while back and wondered if I could make something close. The idea is to have different lights at different heights, the grouping allows the cable to adjust for this. The square-ish light had what appeared to be luminescent liquid which I am not able to figure out yet and the rest were variations of chemistry lab beakers. I have only put three here but you get the idea. Vary the size and place them either randomly or to a pattern you like.