Aqua One Tropical Tubes: Produce high peaks in the red and blue colour spectrum, this colour temperature provides the best lighting conditions for plants, making this tube an excellent choice for planted aquariums. Intended for use in tropical or cold water aquariums. This spectrum produced will bring out the fluorescent colours of your fish and plants whilst providing the lighting requirements plants need to photosynthesise. Converting carbon dioxide to oxygen within aquarium water is one of the key benefits of keeping live aquatic plants.