In an illustrative embodiment, a decorative holographic ornament has a body of generally clear or translucent hard plastic or similar material, of a size suitable for use as a tree ornament or the like. Molded holographic film is applied to the inside surface of the ornament, so that it is protected by the plastic body. An inner wire spool or core is supported in the center of the ornament, and LED wire is wrapped through or around the core. When the LED lights on the LED wire are illuminated, holographic images of the LEDs are generated and visible from the outside of the ornament with a pleasing “three-dimensional” aesthetic effect.