Zoo Med's 6500k high intensity trichromatic full spectrum daylight lamp is ideal for all marine aquariums and reef tanks as well as freshwater aquariums where maximum daylight simulation is required. 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 the aquarium. Long lasting: Effective for up to 10,000 hours.