Question for the crafty and creative ladies!

What the heck can I do with the tall cylinder vases besides candles or flowers. My original idea was to do the three vases with pillar candles and greenery. After I signed my venue contract, I realized that they don't allow open flames so I'd need to buy LED. The tealight LED's are affordable but would look kind of odd in a 12 inch tall vase. The pillar LED lights are just outrageous. Then I looked at floating LED lights because I thought maybe the various sizing on the pillars is what was making them so pricey but those were MORE expensive. Flowers would more than likely be more pricey. I'll have around 25 tables with three vases on each. Does anyone have any ideas or recommendation? I don't want it to look tacky. I even emailed the venue to see if there was any chance they'd make an exception for floating candles because they're floating... on water... but she said no. Please help me