Improvement in an ornamental device for ornamenting a room having a light source therefor comprising joined together front and opposite side members, the side members projecting from the rear face of the front member and an arrangement for attaching the device to a corner of the room formed by the junction of a wall and a ceiling thereof so that the light source and one device covers the edge of the front and side members press against the ceiling and another edge thereof presses against the wall, the attaching arrangement being a yieldable member arranged to pull upon the rear face so as to pull the device inwardly toward the corner, the members each having at least one translucent panel therein for passing light from the source therethrough from inside the device to the outside thereof, whereby to decoratively affect the illumination of said room.