Lighting units for use in a variety of enclosures/containers to achieve a desired illumination effect are provided. The enclosures/containers are susceptible to illumination from within, defining an interior region for receipt of a lighting unit. The enclosure/container and the lighting unit are combined to achieve a desired illumination effect, e.g., consistent with a holiday and/or seasonal theme. The lighting unit generally includes a plurality of light elements that are adapted to generate at least three light colors, e.g., red, green and blue. The light elements are adapted to generate light in a pre-selected manner, e.g., pursuant to a selected illumination pattern. The combination may be employed with enclosure(s) having holiday/seasonal themes, e.g., a Jack-O-Lantern, a pumpkin, a ghost, a witch, a black cat, a skeleton, a Santa Claus figure, a candy cane, a reindeer, a snow man, an igloo, a ski lodge, a snowmobile, and the like.