The Saim Aquarium Glowing Effect Artificial Coral Ornament Fish Tank Decor is a great way to add some style to your aquarium. The glowing effect is created by a combination of blue, pink, purple, red, orange, yellow, and green fluorescent lights that are controlled by a computer. Each plant in the tank has a suction cup base for holding it in the water. The size of the plants is 2 inches high and 2 inches wide at the top, and 6 artificial corals are included.