In this video we make white carnation flowers glow in the dark when exposed to ultraviolet light.
What we're essentially going is making them fluorescent. To do this we get a fluorescent highlighter and open it up to get the foam ink cartridge. Then squeeze a few drops of the ink into a cup of water. Place the base of a white carnation flower into the solution and cut the stem underneath. Leave the flower overnight for the solution to absorb through.
The next day, simply shine an ultraviolet light onto the flower to cause the fluorescent dye to glow.