It's taken me five months to finish my niece's birthday present of a jellyfish chandelier. The first attempt ended up looking like a Rastafarian octopus in shades of purple and green when what I was aiming for was an airy, lightweight, whimsical jellyfish light fixture.
The above is my second attempt using mostly silk and fiber optic cable. I think it captures the spirit of a jellyfish chandelier pretty well despite some (fixable) flaws.
The components for this chandelier were thrift store finds, one Dollar Store salad bowl, and a piece of fiber optic cable, brinding the total cost to about $15.