Improve coral and fish environments with aesthetically pleasing and functional light. World famous Radium Mogul-base Metal Halide Bulbs deliver brilliant blue coloration and significant PAR (Photosynthetically Active Radiation) values that support healthy photosynthetic corals and reef invertebrates. Single-ended Mogul (E39) base bulb is ideal for reef aquariums or any system that requires high light conditions. Maintain optimum aquarium light conditions by replacing old metal halide lamps. German made.
400 Watt Radium works best with 400W M135 Ballast or 400W Electronic Ballast.
Handle bulb by socket end only, DO NOT touch bulb.
Shop all aquarium Metal Halide Bulbs & Lamps.
Please click on "More Information" for further details and safety and handling instructions.