One super long (4 foot) glass pane vase filled with white pillar candles at varying heights. This would be the inexpensive option at $189 per ledge.
With this option we would create a dense anemone and white spray rose arrangement in a shorter (2 foot) glass pane planter in the center of the ledge with a set of pillar candles on either ends of the ledge. While this option would be lovely I do worry the flowers would get a bit lost. This option would be $290 per ledge. Personally, I think option 1 would be beautiful and serve the purpose well.
The centerpieces will be dense white arrangements prominently featuring white anemones with black centers. $175 - $225 per table.