Saim Glowing Effect Artificial Coral Plant for Fish Tank Decor Aquarium Ornament Glowing effect requires aquarium lighting for the fluorescent glow highlight. Decorate your aquarium all the time with minimum maintenance. Each plant has weighted base to keep the item stay under water stably otal size: 8.5cm x 7cm/3.3"x 2.8"/W*H. (Approx.) NOTICE: In order to get better fluorescent glow highlight, PLS put Blue, Pink, Purple coral under aquarium PURPLE RED or RED lighting; and the GREEN, ORANGE, YELLOW under BLUE or BLACK light.Thanks.