The Radium Metal Halide 400 Watt 20000K Bulb is a premium German-made HQI lamp engineered to provide intense, deep blue illumination for saltwater reef aquariums. This high-performance bulb is designed to enhance the natural beauty of corals and fish, creating a captivating and visually stunning underwater environment.

Featuring a 20000K color temperature, this bulb emits a rich, deep blue spectrum that is highly effective at bringing out the vibrant fluorescence in various coral species and marine inhabitants. It delivers an attractive, actinic look to the aquarium, closely mimicking the light conditions found in deeper ocean waters. For optimal performance and safety, this 400-watt lamp must be used in conjunction with a compatible 400-watt HQI or 400-watt electronic ballast.

This metal halide bulb is an excellent choice for serious reef aquarists and hobbyists seeking to achieve a professional-grade, deep blue aesthetic in their advanced reef systems. Its ability to stimulate coral fluorescence and provide a strong actinic appearance makes it ideal for showcasing SPS and LPS corals, ensuring both their health and an unparalleled visual display.