I don't know much about a fcg version, but
Another way to do this (I haven't actually tried it just thinking out loud)
would be to attach a black rod to the candelabra base and then affixing it to a record player or other slow rotating motor. Having the candelabra attached at the bottom instead of the top, creates a MORE convincing levitation illusion. Onlookers, ALWAYS suspect floating objects are attached by string. So this solves that problem!
Another option is to attach fishing line or invisible thread on the left and right side of the candelabra. Again solving the problem of "that's just a string tied to the top" By pulling the thread in opposite directions the candle should float both up and down and side to side very gently(ghostly)