Aqua Medic T5 Reef White 10K is a bright white lamp with a colour temperature of 10,000 K. The lamp simulates tropical sunlight and is the ideal basic illumination for marine as well as freshwater aquaria. T5 Reef White 10K enhances the natural colours of the fish and brings the brightness of tropical daylight into the aquarium, so plants and corals really thrive. For saltwater aquariums, we recommend combining with T5 Reef Blue to increase the blue spectrum whilst for freshwater the combination of T5 Reef White 10K with T5 Plant Grow will enhance plant growth.this T5 fluorescent lamp is available in the following sizes:-24 W - 55 cm-39 W - 85 cm-54 W - 115 cm-80 W - 145 cm