Ushio 10,000 Kelvin Temperature, 90 CRI high color rendering, double ended metal halide lamps. The Aqualite™ lamps have a high color temperature from a single point source which simulates the appearance of sun light in ocean depths of approximately 5 meters. The superior spectrum balance of the Aqualite™ lamps make for ideal lighting conditions for reef systems including fish, coral, other marine fauna and flaura, and plant growth. Pulse start metal halide or HQI ballast recommended for maximum performance.