Clean your glass cylinder vases with glass cleaner to remove fingerprints.
Place a submersible light at the bottom of the vase (turn it on).
Place glass filler directly over the light, covering it up completely but allowing the light to glow through. You can pick some of the more transparent stones.
Use scissors to cut your faux floral garland down to fill the container. Add to the vase.
Fill with water and place a floating candle at the top.
Notes
Prices can vary greatly for this project. I recommend using as many dollar store items as possible.