COLOR-CHANGING ORNAMENT: GloFish Cycle Light Ornaments change colors under black LEDs, while blue LEDs cause them to fluoresce. GLO EFFECT: Use with GloFish Cycle Light (sold separately) for full effect. EXPERIENCE THE GLO: GloFish fluorescent fish and accessories create a complete underwater fluorescent experience. EASY TO CUSTOMIZE: Cycle Light Ornaments come in different colors, styles and sizes, allowing for easy customization. CONTAINS: 1 large Driftwood Cycle Light Ornament.