2 in 1 design: combines a fish tank oxygen diffuser and a lighting element for a single, streamlined device. Color and ambiance: includes multiple color changing options with a color cycle to create a visually appealing underwater display. Energy efficient and durable: designed to save power and reduce running costs, with long life for reliable use. Easy to install: simple setup and fully submerged for underwater operation in fish tanks, pools, and similar water features. Enhanced tank experience: creates a colorful underwater effect that enhances the tank’s appearance and helps keep fish lively. Use scenarios - Home aquarium: use during the day to support oxygen diffusion while providing pleasant illumination for viewing. - Small to medium tanks: the color cycle adds visual interest for observers without complexity. - Outdoor or decorative water features: submersible lighting in pools or other submerged setups to create ambient underwater color.