D and D Giesemann Aqua Flora 24" 24 watt T5 HO Lamp 5700 K This lamp is specially designed for freshwater use but can also be used for color enhancing of saltwater coral tanks. It will bring out the blue and red colors of fish and coral and enhance plant growth in freshwater tanks. These lamps can be used in combinations. We recommend the midday 6000K to be used in conjunction with the aqua flora for freshwater.