This lamp is designed to replicate the true natural light from the Tropical Seas. It contains optimal daylight spectrum particularly useful to the Reef Fishes and Invertebrates. It reflects natural warm Colours as seen on the reef.New T5 Technology: Allows us to gain High Performance from Fluorescent Tubes Relationship between length and power is far more favourable and Luminous efficiency (Lm/W) is greatly improved. Light is intensified increasing the ability to penetrate to the bottom of the aquarium base. This type of lamp is suggested for high light aquariums including Planted or substrate dwelling Invertebrates.