WOWindows add that extra special touch to your Halloween and Christmas decor without the high cost of big decorations. Simply apply the removeable corner stick adhesives to your indoor window frame, position the poster and check placement of art, trim if necessary, and enjoy the glow as your household lights do the rest! No special lighting necessary. WOWindows are specially made to create an awesome back-lit effect just from your regular house lights. With everything from classics like black cats and zombies to new licensed styles like Freddy Krueger and Jason Voorhees.