Jck Skellington Nightmare before Christmas. Spooky and Fun. These Halloween Glow Necklaces come with a UV Light so you can instantly infuse the necklace with glowing brilliance in seconds. The glow lasts for hours. You may also charge the jewelry via  sunlight or a lamp, if you prefer the more traditional method. UV Light makes for a stunning and bright glow effect that can be repeated. Gift-Boxed. Fun to wear for Halloween parties and events or give as a wonderful gift of the season.