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150 Watt 14500K Metal Halide Double Ended - Megachrome Coral

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MB2669

This item has been discontinued.

Giesemann Aquaristic

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

Most of the MH bulbs in the same wattage format can be interchanged. However, please contact us to make sure.

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.

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


pickle from Colorado

11/22/2010

Experience Level: Expert

very bright white so far

decided to try the 250W DE version of this bulb after running 20K Ushios for the past 8 months. So far they are EXTREMELY bright white. Not much yellow and not much blue, either. Apart from large Sarcophyton that is just below the water surface showing some burn, all the corals in my mixed tank are responding very well to these bulbs, but I'm not sure how I feel about the color of these bulbs just yet. They've only been running about 45 hours so far so they still appear a bit "harsh" to my eye. It's like they are so bright the color gets washed out of some of my LPS corals (but the polyp expansion is impressive). I'm hoping they mellow out a bit once they hit about 100 hours or I might have to go back to 20Ks.

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RONALD MIAO from WEST PALM BEACH, FL UNITED STA

11/08/2010

Experience Level: Intermediate

Best in Class

I've tried several other MH bulbs, and the Giesmann is the best in class. You can really see the difference with the corals. They thrive under the Megachrome and look true to life, whereas with other bulbs the corals do not do as well. I tried using Megachrome and another bulb in the fixture and the side of the tank with megachrome did much better.

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WILLIAM PERNETT from TUCSON, AZ UNITED STATES

01/16/2009

Experience Level: Intermediate

Giesmann Bulbs

It is a little early yet for me to give a complete review of these bulbs. I am running a Hamilton setup with four atinic blue compact floresents and three HQI 250W metal halides. The megachrome bulbs look a little whiter than my previous Hamilton 14k models. For a 14.5K bulb it is a little strange. They look great, however I don't yet know if I can justify the cost. Long term testing will give me a better idea. My tank is a 125 Gal Reef.

1 out of 2 found this review helpful

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JOHN N from MEQUON, WI UNITED STATES

02/12/2008

Experience Level: Expert

Giessemann

These lamps are great! My SPS corals really look good under them and grow too. Also have LPS and some softies.

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SEAN LESSENGER from AUSTIN, TX UNITED STATES

12/03/2007

Experience Level: Expert

Very Disappointed

I was very disappointed with the color of the Geisemann 14500k Mega Chrome bulb. I allowed for the 180-200 hour burn in time and the color was still very disappointing. They were very yellow and burned very hot in comparison to the Hamilton 14K bulbs I was replacing. The most expensive bulbs are not the best overall product.

5 out of 7 found this review helpful

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KEITH PETERSEN from NEW YORK, NY UNITED STATES

11/30/2007

Experience Level: Expert

I like them

I've tried a lot of DE HQI bulbs over the years and this one is the best...for me. I run a 135 Reef and use three of these over the tank. I've focused on SPS but have a few LPS hard corals. These lights bring out the best combination of bright colors and healthy growth. The light is a crisp white with a hint of actinic.

8 out of 8 found this review helpful

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SAMUEL HERRERA LEDESMA from EAGLE PASS, TX UNITED STATES

07/18/2007

Experience Level: Intermediate

excelent!!

excelent product, I recommend 100%.

2 out of 6 found this review helpful

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