New T5 lights provide more light output than T8s.6,500K High Intensity super daylight lamp brings out the full colors of your fish, plants, corals and invertebrates. Ideal for all marine aquariums, reef tanks and fresh water aquariums where maximum daylight simulation is required. Combine with Zoo Meds FloraSun for maximum plant growth. Combine with Zoo Meds CoralSun for all live coral invertebrate reef tanks. Distributes the light evenly across the water surface. Generates less heat as compared to metal halide lamps.