The Coralife Mogul Base Metal Halide Lamp, 400W, can be used to replace any 400W mogul base metal halide lamp. The 20K color temperature is most commonly used with reef aquariums.
NOTE: The bulb you receive may be more globular in shape than the one pictured. Coralife has sent us both types and Coralife treats both bulbs as the exact same product.
