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400 Watt 20000K Metal Halide Bulb - German Radium, Mogul Base
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400 Watt 20000K Metal Halide Bulb - German Radium, Mogul Base

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Item #: MB8811

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The 400 Watt 20000K Metal Halide Bulb - German Radium, Mogul Base from Pet Store gives you a simple yet effective light product that can brighten up your artificial marine ecosystem. Easy to install and very, long-lasting, this ...
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400 Watt 20000K Metal Halide Bulb - German Radium, Mogul Base Information



Part #: MB8811

The 400 Watt 20000K Metal Halide Bulb - German Radium, Mogul Base from Pet Store gives you a simple yet effective light product that can brighten up your artificial marine ecosystem. Easy to install and very, long-lasting, this item will certainly give off the light needed to make your fish tank more radiant, and it will give off the lumen energy needed by your aquatic animals, plants and rocks.

The product was designed by a marine scientist, and it features two different yet equally essential phosphor materials. It can give light to your aquarium very effectively, making the beautiful and vibrant colors of your pets and its surroundings stand out to provide you a better view and outlook. It can also give of the proper lumen intensity so your pets will have an ample supply of vitamin D while your plants and corals can produce and process their diet properly. The light rays encourage the growth of friendly micro-organisms that your pets can eat. With its mogul base, it is easier to install on the fixture than many double-ended products.

So what are you waiting for? Get your own unit of the 400 Watt 20000K Metal Halide Bulb - German Radium, Mogul Base now! With this state-of-the-art lamp, your pets will definitely have a brighter future.

Radium 20000K metal halide bulb offers excellent coloration and good intensity. It is crisp-white with a strong blue tint. It brings out the fluorescent pigments in corals nicely. Fluorescent supplementation is usually not necessary, but can be used for added intensity and to simulate dawn and dusk. An electronic ballast, magnetic pulse-start ballast or magnetic HQI ballast is required to ignite this bulb. This bulb is white with a blue tint on a magnetic HQI ballast. It will burn more blue on an electronic ballast or pulse-start ballast. An excellent choice for  reef tanks 18" or deeper.

Common questions/problems concerning metal halide lamps:
  1. Metal halide lamps of the same kind are different colors?
    Metal halide lamps operate by passing an electric arc through an arc tube that excites particles in the arc tube. When the metal particles reach an excited state they emit energy in the form of visible light. It takes 100 hours of operation before the metal particles stabilize and become a consistent color. All metal halides require 100 hours of operation before color and light output stabilize. All metal halides inherently have a slight color variation between individual lamps.
  2. The metal halide lamp fires and then either burns dull or the arc extinguishes?
    Usually the ballast and lamp are not receiving enough power. Metal halides pull a high current. Usually the problem is either there is too great a load on the circuit or the extension cords are of a small wire size and can`t handle the power needed by the ballast. Use only heavy duty extension cords and try running a ballast off a circuit from another part of the house.
  3. Do I need a cover shield between the lamp and the aquarium?
    Metal halide lamps produce a large amount of UV and also have a potential of exploding. The single ended metal halide lamps have an outer jacket which eliminates most of the UV. However, they have an inherent risk of exploding and UL requires metal halide lamps to be enclosed. On double ended lamps there is no UV shield. Double ended lamps must have a glass shield or major eye injuries including blindness may occur.
  4. Can I operate a ballast and lamp together which are designed for different wattages?
    Each wattage lamp and ballast are designed together for optimal performance and safety. If you over drive the lamp it may explode and shorten the life of the ballast and lamps. If you under drive the lamp it will also shorten the life of both components and also may explode. Do not mix different type wattages of lamps and ballasts.
NOTE: The bulb should be handled carefully. Using soft gloves is a good idea to keep finger prints off bulb. This is during installation and replacement.

*Requires HQI ballast, electronic ballast or pulse start ballasts to work properly.

Bulb Replacement Guide
Bulb Types Life of Bulb*
Normal Output Fluorescent 6-12 months
Very High Output (VHO) 6-12 months
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