Flash the bulbs hanging over the letters Y-E-S if you want this Stranger Things Light-Up Necklace. Made of plastic, the Stranger Things costume accessory is a reference to the alphabet wall created by Joyce Byers in season 1 of Netflix’s Stranger Things. Joyce uses a set of Christmas lights positioned over alphabet letters to communicate with her son in the Upside Down. This costume necklace features 7 colored bulbs-green, yellow, red, & blue-that light up as the necklace is worn. Complete your Stranger Things costume or outfit for Halloween or Comic-Con with this Stranger Things Light-Up Necklace.