Fluval 22-Inch Life Spectrum T5 Aquarium Fluorescent Bulb, 24-watt Provides balanced natural light spectrum and strong plant growth Closely mimics natural mid-day sun, accurate color rendering for a natural-looking aquarium Intense, powerful illumination effectively penetrate deep aquariums Effectively stimulates photosynthetic process in plants, corals and other invertebrates Ideal for freshwater, saltwater and planted aquariums; coral and invertebrates