Xcellent Global Multi Color Changing 12 Inch 12 RGB LED Underwater Submersible Aquarium Fish Tank LED Lights Air Bubble Lights M-LD080S Great night light for wonderful nocturnal viewing, produces a impressive RGB colors air curtain, adds a whole new decorative dimension to any aquarium. Self-weighted, quick assemble and install in your aquarium, suitable for fresh and saltwater aquarium. Use low voltage DC 12V working voltage, safe and won't cause any harm to people or fish. There 7 different colors changing and you need not to change them by yourself. Length: 31cm/12inch; width: 2.5cm/0.97inch; height: 1.2cm/0.46inch; Power: 4W