Up-cycled Christmas Light Decorative Balls. Supplies: Burnt out Christmas lights, foam sphere, hot glue gun, acrylic paint, foam brush. 1. Scratch up (score) your foam sphere for grip purposes 2. Paint foam sphere with foam brush the same color as your Christmas light choice, allow to dry. 3. Hot glue lights to your foam sphere, base-in and very tightly together. Wondering if this couldn't be a cute centerpiece for the annual alpine ladies Christmas dinner.