24 Piece Glow in the Dark Dinosaurs Glows for 20-30 minutes after the lights go out Quickly recharges with light. The stronger and brighter the light source; the longer and better the glow Glows continuosly under UV blacklight Double sided non toxic adhesive included Easily mounts to wall and ceilings. New and improved adhesive and glow formula effective Oct 1, 2018. Satisfaction guaranteed!