Tea lights set in mason jars: I like this idea combined with frosted mason jars which is just a simple spray can. Place multiple jars at each table. We can get mason jars of all differing sizes at Goodwills in the area.
Side view of unique wedding centerpiece. White flowers in test-tube vases, hanging from the ceiling by clear fishing line. Or hang them upside down so you see the full bloom when you look up from the table.