Chris Slade describes the son et lumiere presentation at the abbey of Bon Repos called "Le Pays de Conomor" in Brittany, which takes place during the first two weeks of August.
I tried our local florist’s trick and it worked!
Only put 1 cm of water in the vase and keep adding water every morning and your tulips will stay fresh longer.
I managed to keep mine over a week.
Try it and let me know!