14,000K 250 watt double ended HQI metal halide lamp. A bright mix of blue and white light producing a crisp ice blue color. This bulb is brighter than a 250 watt 20K double ended bulb and is a great choice for reef tanks. This bulb will bring out fluorescence in corals & fish well. Must be used with a 250W HQI ballast or 250W electronic ballast.