This package includes 104 pieces which include 4 background design inserts, 90 alphabet inserts and 10 icon inserts for the Lightbox Glow. These inserts feature a blacklight reactive printing that works with the Lightbox Glow to create the glow effect.: 4 Background/90 Alpha/10 IconThese inserts feature a blacklight reactive printing that works with the Lightbox Glow to create the glow effect.