The Radium 400 Watt 20,000K lamp is a high-performance metal halide bulb designed to meet the demanding lighting requirements of saltwater reef aquariums. Manufactured in Germany by Radium, a company with over a century of experience, this lamp provides the intense, specific light spectrum necessary to support coral health, enhance vibrant coloration, and promote photosynthesis in marine invertebrates. Its crisp, blue-white light effectively simulates the deep-water oceanic environment, bringing out the natural fluorescence of your corals.

This specialty lamp operates at 400 watts and features a high color temperature of 20,000 Kelvin, ideal for achieving that sought-after deep blue aesthetic. It is equipped with a standard E40 Mogul base for compatibility with appropriate fixtures. The bulb has a clear finish, ensuring maximum light output, and measures 273 mm in length with a diameter of 46 mm. Radium's reputation for quality and innovation ensures a reliable and consistent lighting source for your aquarium.

This bulb is best suited for experienced reef aquarists with larger or deeper tanks that house light-demanding species, such as SPS corals. Its high-intensity output penetrates deep into the water column, providing ample PAR for even the most challenging corals. Hobbyists looking to maximize coral growth rates and achieve stunning, fluorescent coloration will find this German-engineered lamp to be an essential component of their high-end lighting system.