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Home » Saltwater Aquarium Supplies  » Lighting  » Light Bulbs  » Metal Halide  » Double Ended  » 250 Watt  »  250 Watt 14000K Metal Halide Bulb - Hamilton, Double Ended
250 Watt 14000K Metal Halide Bulb - Hamilton, Double Ended

250 Watt 14000K Metal Halide Bulb - Hamilton, Double Ended

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250 Watt 14000K Metal Halide Bulb - Hamilton, Double Ended Information


The double-ended 14000K metal halide bulb offers excellent coloration and good intensity. It is crisp-white with a 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. It must also be housed inside a pendant. It cannot be used with simply a reflector in an open application as UV rays emitted by the bulb must first be filtered with a UV-proof lens. An excellent choice for  reef tanks 22"–30" 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: Double ended bulbs should always be used with the UV shield (supplied with most pendants). You and 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

Manufacturer Info

Hamilton Technology Aquarium Supplies
Hamilton Technology is the leading manufacturer of high quality aquarium lighting offering customers the widest selection of metal halide, compact fluorescent and VHO lighting available today at the lowest prices. Their mission is to offer state-of-the-art lighting that meets high standards of quality, innovation and value. Hamilton Technology has served the lighting needs of both the professional and the hobbyist aquarist for more than sixteen years and is considered by many to be the choice of experts.

250 Watt 14000K Metal Halide Bulb - Hamilton, Double Ended Reviews

Average Rating
(10 reviews)
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Reviewers Rating Excellent!

Posted: 7/9/2015 from Torrance, CA UNITED STATES
5.0 5
Experience Level: Expert

Comments: Nice color, cool, sharp, clear. I like. Tip: I couldn't get them in without greasing the contacts.

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This light Rocks

Reviewers Rating Excellent!

Posted: 7/30/2014 from BROADALBIN, NY UNITED STATES
5.0 5
Experience Level: Intermediate

Comments: The old bulb burned out, so I purchased this one to replace it. Works as expected!

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Great Light

Reviewers Rating Excellent!

Posted: 3/7/2013 from SOUTHGATE, MI UNITED STATES
5.0 5
Experience Level: Intermediate

Comments: This is my second Metal Halide system in the last 20 years of reefkeeping, by far the best lighting sytem I've had, beautiful crisp color, nice shimmer.

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Reviewers Rating Excellent!

Posted: 8/12/2012 from SAN LEANDRO, CA UNITED STATES
5.0 5
Experience Level: Expert

Comments: I really like the look of this bulb. I have it over my reef tank and I get good coral growth - SPS has been doing great with this bulb - and nice color. It works best with actinics - right now I am using it in conjunction with 2 - T12 Super Actinic blue bulbs. It is a great combination if you want color and growth.

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Nice bulb

Reviewers Rating Great

Posted: 5/3/2011 from RENO, NV UNITED STATES
4.0 5
Experience Level: Expert

Comments: I used this bulb to replace an AquaMaxx that burned out on me in a matter of weeks. The Hamilton is a nice blue, but not quite as bright as the AquaMaxx. It certainly is lasting much longer, though! It is more blue than white; it appears closer to a 20,000K than a 10,000k. The colors of the coral are really brought out by this light, especially the greens and purples, but I was hoping for a light more as advertised "crisp white with a blue tint". The coral looks good and grows well under it which is what counts, though.

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250 Watt 14000K HQI

Reviewers Rating Average

Posted: 2/7/2011 from OGDENSBURG, NY UNITED STATES
3.0 5
Experience Level: Intermediate

Comments: I am not really impressed with this bulb due to the weak ceramic base on the sides. I inserted it into my reflector and without to much preasure the top portion of one side broke off. Not that this reflects on the bulb performance, it works great. It could be beefed up a little on the sides. Overall the 14000k color is stunning and the bulb really does work great. Just be careful not to press to hard.

2 of 2 People found this review helpful, did you? Yes No


Reviewers Rating Excellent!

Posted: 12/19/2008 from MIAMI, FL UNITED STATES
5.0 5
Experience Level: Expert

Comments: Arrived perfectly and I love it!!!

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dont buy

Reviewers Rating Unsatisfactory

Posted: 7/21/2008 from SAN DIEGO, CA UNITED STATES
1.0 5
Experience Level: Expert

Comments: 14k burnt out after 6 months, absolute garbage, 10k still going strong

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Low life

Reviewers Rating Unsatisfactory

Posted: 9/3/2007 from DORAL, FL UNITED STATES
1.0 5
Experience Level: Expert

Comments: I have tried 5 bulbs so far, they all burn in about 6 months of life, kinda short for my taste, even using them on different lamps, and on different setups, they never survive for more than 7 months, they have on my experience a short life.

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Great bulb, short life

Reviewers Rating Great

4.0 5

Comments: This bulb has a great color to it, but mine only lasted 7 months. Hope the next one lasts longer.

3 of 6 People found this review helpful, did you? Yes No

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