Note: It's not "shining in the dark" Luminous effects only occur under actinic lighting, and it is recommended to use blue or purple lighting. The glowing artificial mushrooms provide a wonderful view of the ocean world. Dimensions: 10 x 6 x 10 cm (approximately). Made of non-toxic, brightly colored silicone, it looks very realistic and natural. The sturdy suction base makes it easy to suck in a smooth aquarium.