150 Watt 14000K Metal Halide Bulb - Ushio, Double Ended

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We offer a wide variety of Metal Halide bulb choices to suit your aquarium lighting needs.

A Metal Halide Lamp is a high-intensity discharge light source in which the light is produced by the radiation from mercury, plus halides of metals such as sodium, scandium, indium, and dysprosium. The K at the end of color rating for each bulb stands for Kelvin. This is a measurement of the color temperature. The higher the Kelvin rating, the cooler (bluer) the color of light given off by the bulb. In general, the color given off by the 10,000K German is interpreted as being a perfect white color.

There are two main considerations to decide upon when chosing Metal Halide bulbs and systems: wattage and color temperature.

  1. There are generally two considerations when planning wattage, tank depth and the requirements of various types of corals. Tanks 18" and shorter will, typically, use 175 or 250 watt MH bulbs. Typically, tanks 24" and over will use 400 watt MH bulbs. I have found most soft and large-polyped-stony corals to do just fine within 5-15 inches from a 175 watt bulb and 10-24 inches from a 400 watt bulb. Most small-polyped-stony corals survive within 5-10 inches from a 175 watt but appear to thrive within 5-15 inches of 250 and 400 watt bulbs. These are all just general statements to assist in going the correct route with chosing wattage. They are not absolute truths.
  2. Color temperature is a hotly debated topic where there is no one recommendation that will fit everybody. Lowers Kelvin temperatures are yellower and greener colors while higher Kelvin temperatures are whiter and bluer colors. There are two factors that determine most hobbysts choice of bulb colors, par rating and aesthetics. The 6500K Iwasaki bulb is generally regarded as an excellent PAR rated bulb. However, it`s green tinged yellowish color makes for what is considered by many as poor aesthetics. This is not the say the much bluer 20,000K German bulb is aesthetically ideal. Many hobbyists complain this bulb is too blue. By far, the bulbs most popularly purchased are the 10,000K German and the 12,000K Sunburst bulbs. The majority of hobbyists choose aesthetics as the determining factor of chosing color temperature for the primary reason that the appearance of our aquariums is of utmost importance. Due to the subjective nature of color preference, we refrain from making suggestions on which color temperature is right for you. Instead, we have a visual bulb comparison of the popular bulbs on the market.
As a general rule of thumb, use one metal halide bulb for 24" of tank length. Most of the Metal Halide bulbs in the same wattage format can be interchanged. However, please contact us to make sure. Metal Halide bulbs are one the most difficult aspects of the hobby to recommend. Most of the information here is general.

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: Double ended bulbs should always be used with the UV shield (supplied). Your corals can suffer from excess UV radiation otherwise. The bulb should be handled carefully as well since it has no outer glass casing. 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

Product Manuals & Documentation

150 Watt 14000K Metal Halide Bulb - Ushio, Double Ended

Owner's Manual available for download in Adobe PDF file format

Manufacturer Info

Since the North American operations began in 1967, it has been USHIO America, Inc.`s charter to provide customers with unrivaled customer service. With over 4,000 products in their portfolio, from unique specialty light sources for critically important and demanding applications, to general illumination lamps for architectural and task lighting, USHIO has earned worldwide respect as a company that delivers on its promise to meet the world`s lighting needs.


9 month pro-rated warranty

35 Reviews



Experience Level: Intermediate

Great Color

Love the crisp Blue color, along with my Actinic PC bulbs, they really bring out the color of the fish and Coral.

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NATHAN TERRY from Colorado Springs, CO UNITED ST


Experience Level: Intermediate

One of two worked

I bought two bulbs. One of them worked fine. The other glowed very weakly when I turned the lights on. I reinstalled the poor bulb and it wouldn't go on at all. There were burn marks on the bad bulb after it glowed weakly. I carefully followed the installation intructions and used gloves. Now for $100+ I have 1 light nice bulb and one paperweight. Sigh...

1 out of 1 found this review helpful

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Experience Level: Expert

Too yellow!

I have used the Hamilton Technologies or Current 14k hqi bulbs in the past and they provided a nice white/light blue color. I decided to try this Ushio bulb because of the great reviews and the retailer does not sell the other two brands.I installed the lamp last week and I noticed that my corals and my clam have responded very well to this lamp. I noticed that my zoos and other corals are showing better expansion. I'm not sure if this is due to the new lamp or just the spectrum that it emits. I'm not so happy with the color of this lamp. This 14k lamp has the color of the 10k bulb that I have in another tank. It appears that this lamp has far too much of the yellow in it.

1 out of 1 found this review helpful

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Experience Level: Intermediate

Great bulbs

These bulbs give off a beautiful color! Just what I was looking for. Not too blue, not too yellow. Just a crisp white light. With my actinics on the tank looks perfect!

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Experience Level: Expert

Good for the Price

Great bulb for the price! Good color and exceptional shimmer.

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Experience Level: Intermediate

Incredible Growth

After researching bulbs to replace my two AQ 250 watts that came with Aqua Medic Ocean Light these seemed to be a logical choice. I am very pleased with the decision. These bulbs are far superior while costing less then the OE bulbs. The bulbs are producing incredible results. The color of the bulbs is a crisp white with blue undertones, not yellow at all. These are by far the brightest halides out there! If you keep corals with high light requirements and like a more natural look these are the bulbs for you.

1 out of 2 found this review helpful

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Experience Level: Intermediate

250W bulb

Corals look great with this lighting. A little tough to change the bulb, extra tight fittings.

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Experience Level: Intermediate

14000K Metal Halide Bulb - Ush

Just put the bulb in my fixture yesterday. So far so good, but they say it takes up to 2 weeks for the bulb to "burn-in".

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Experience Level: Expert

Ushio 250W DE MH

Color: Consistently as advertised across all of the Ushio brand bulbs I have used over the years. Price: Unbeatable! Longevity: I have been replacing my DE bulbs every 12-18 months without a noticable change in color, though a change in intensity is noticed and expected when replacing an older bulb with a new one. To avoid shocking your tank's inhabitants, just acclimate the system by increasing the photoperiod over the course of a week when the new buld is installed (beginning with 4-6 hours of light and adding on an hour or so per day). All in all, great bang for your buck. I will continue to purchase these bulbs for my own tanks and recommend them to others.

2 out of 2 found this review helpful

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Experience Level: Intermediate

Loved it!

I loved the service. It was easy to place my order. And it arrived in no time. Highly recommend.

0 out of 1 found this review helpful

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