The UltraSun HO T5 Super Daylight is a 6,500 K high intensity lamp that brings out full colors of fish, plants, corals and invertabrates. Ideal for marine aquariums, reef tanks, and freshwater aquariums where maximum daylight simulation is needed. Combine with Zoo Med's CoralSun for all live coral and invert tanks. Combine with Zoo Med's FloraSun for maximum plant growth. High quality made in Germany.