Ocean Medal&reg; Birthday Gifts Party Props Luminous Wall Windows Sticker Owl Cat Pumpkins Scarecrow Witch Bat Skeleton Decorations Material: Plastic. They are made from quality plastic suitable for use inside or out. Ideal for decoration, haloween parties, party invites and general haloween fun etc. Ideal for applying on doors, lamps,household articles,bedroom ceilings and any smooth,clean surface,it adsorbs light during the day and glows in darkness about 5 hours. Give your home a spooky make over with these excellent glow in the dark stickers. These great stickers are removeable, reuseable and easy to peel and stick.