This 150W 14000K bulb will cast a crisp-white light with a blue tint. Great for bringing out the coloration of fish and corals while providing sufficient intensity for growth. An HQI or Electronic ballast is required. This bulb is offered at an excellent price and is the perfect choice for reef tanks up to 18" deep. * 14,000K Color Temperature * Made in Japan * Excellent with or without actinic supplementation * Operates on an HQI metal halide ballast or electronic ballast