As for materials, you'll need two matching glass vases per light fixture, one-way window privacy film, a strip of flexible mirror sheet, strong adhesive like Gorilla Glue, Velcro, and a battery ...

A strip of flexible mirror sheet can be glued along the seam or around the vase for an extra pop of shine, a trick similar to the one in DIY a glamorous vase with this Dollar Tree upcycle.