Zoo Med 30 Inch Ultra Sun Flourescent Bulb (T8 STD Output) 6500k high intensity trichromatic full spectrum daylight lamp. Ideal for all marine aquariums and reef tanks as well as freshwater aquariums where maximum daylight CRI rating of 98 provides excellent color rendition and contrast perception. Balanced coverage of the full spectrum of visible light as well as UVA. Promotes the photosynthetic process in plants and marine algae while enhancing the natural beauty of