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150 Watt 20000K Metal Halide Bulb - Radium, Double Ended
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150 Watt 20000K Metal Halide Bulb - Radium, Double Ended

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Item #: MB2812

MSRP: $131.99 Save: $51.50 (39%)
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150W 20000K METAL HALIDE DOUBLE ENDED BULB—RADIUM The German-made 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 pigme...

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150 Watt 20000K Metal Halide Bulb - Radium, Double Ended Information



Part #: MB2812

150W 20000K METAL HALIDE DOUBLE ENDED BULB—RADIUM

The German-made 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 up to 22" deep.

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.

Bulb Replacement Guide
Bulb Types Life of Bulb*
Normal Output Fluorescent 6-12 months
Very High Output (VHO) 6-12 months
Power Compact (PC) 9-12 months
T5 High Output (T5HO) 9-18 months
Metal Halide 9-12 months
LED (non-moonlight) ~5 years (50,000 hours)
* Manufacturer Recommendations
 



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150 Watt 20000K Metal Halide Bulb - Radium, Double Ended Reviews

Average Reviews

Customer Reviews

great bulb Product Review by ERIC VERNON (Posted on 2/26/14)
Rating
Excellent!

Comments: i bought this bulb to replace my phoenix 14k ...the color is great. i was expecting different color though. this bulb is unlike any other 20 k bulb, it is bright white instead of that deepwater blue that most 20k are..if you like phoenix you will like this bulb its almost like a phoenix upgrade

Radium 20k Product Review by All Delight (Posted on 2/26/14)
Rating
Excellent!

Comments: I haven't tried alot of different bulbs, so my comparison is minimal. I've tried the phoenix 14k, and one other 20k bulb (I forgot the name). So far this is the best.

150w 20k Radium Product Review by ZAC SPATES (Posted on 2/26/14)
Rating
Excellent!

Comments: I just switched from a Ushio 10k to a Radium 20k and absolutely love the color I get from the bulb. On my magnetic ballast, I get a nice crisp white/blue without the need for any supplemental actinic.

Definately the best 150w bulb I've used.

bright Product Review by RYAN SLINGER (Posted on 2/10/12)
Rating
Excellent!

Comments: So bright a little more white then I expected though

excellent bulb Product Review by STEVEN MOSCA (Posted on 3/2/11)
Rating
Excellent!

Comments: after about 4 months of running an led fixture on my mixed reef 30 gal tank i decided to try a mh fixture due to lack of color of most of my corals. i read good things about the radium bulbs so i figured id give it a try.

personnaly i like a little more blue in my tank and this bulb it the perfect combo. i dont think there is a need for actinic supplimentation but i prefer to run mine about 3hours in the morning and 3 hours at night and overlap them with the mh lighting.

within 3 days, 2 for my monipora corals were starting to turn a nice purple color vs. a dull brownish orange. my frogspawn opens up 2x's as much as before.
might have to frag it now.

1 think u must consider when u purchace this bulb. it is meant to be run on a magnetic hqi(m81)ballast, per the manufacturer. if u dont it will greatly reduce the par value and the longevity of the bulb. par is about 47 on a hqi ballast vs. about 37 on most electronics.

if u dont plan on running this bulb on a magnetic hqi ballast dont waste your money. your better off with a hamilton or phoenix 14k for 1/2 the price, which are great bulbs also.