Great Aquariums Start Here
1-800-566-3474
    Free Shipping On $175+
  • FREE Shipping On $175+
  • 14-Day Low Price Guarantee
  • 14-Day Low Price Guarantee
  • Same Day Shipping
  • Same Day Shipping
FREE Shipping on Orders Over $175
FREE Shipping on
Orders Over $175
Standard ground shipping (1-7 business days) starts at a low $5.99 and most orders over $175 ship FREE. Learn More
14-Day Low Price Guarantee
If you find a product we sell for a lower price at another online store, we will match their price—today and up to 14 days after you've purchased the item! Learn More
Same Day Shipping
Same Day Shipping
We promise to ship your order as fast as humanly possible. In fact, 99% of orders placed before 6 pm EST ship the same day! Learn More
Home » Saltwater Aquarium Supplies  » Lighting  » Light Bulbs  » Metal Halide  » Double Ended  » 150 Watt  »  20000K Metal Halide Bulb - Megachrome Blue, Double Ended
20000K Metal Halide Bulb - Megachrome Blue,  Double Ended

20000K Metal Halide Bulb - Megachrome Blue, Double Ended

Item #:
Please make a selection
Size:
Quantity:
$89.99 to $89.99
Marine Depot 60-day Returns
At Marine Depot, we stand behind our products. That is why we offer a 60-day return period: one of the best in the industry! Learn More

20000K Metal Halide Bulb - Megachrome Blue, Double Ended Information




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





Manufacturer Info

Giesemann Aquarium Lighting Systems
Giesemann Aquarium Lighting Systems is the market leader in Germany thanks to their beautifully engineered designs and unsurpassed build quality. Thorough testing during the research and development stages of Giesemann products ensure total reliability and longevity in the finished product. Giesemann lights can be used to illuminate both freshwater and saltwater aquarium systems. They offer a variety of high-end metal halide and T5 fluorescent aquarium light fixtures, bulbs and accessories, like cooling fans and suspension kits. Giesemann is one of the few brands that pays as much attention to the exterior design of their products as they do to the hardware they put in them. This attention to detail is evident in their modern, minimalistic designs and has helped garner the brand a reputation for crafting first-class products.
+ Display More

20000K Metal Halide Bulb - Megachrome Blue, Double Ended Reviews



Average Rating
(13 reviews)
Sort Reviews By:
of 2
Page


Worth every penny

by
Reviewers Rating Excellent!


Posted: 10/24/2013 from Saint Charles, IL UNITED STATE
5.0 5
Experience Level: Expert


Comments: This bulb was the first that I have purchased for my nano. I usually try to go with the cheaper bulbs which saved me maybe $20-$30 dollars. This bulb was a major difference immediately. I would strongly recommend this if you want a super bright bulb with great blue tint. Everything in my tank responded like never before to the intensity and color of this bulb.


Did you find this review helpful? Yes No




Bad bulb

by
Reviewers Rating Below Average


Posted: 4/22/2013 from PARADISE VALLEY, AZ UNITED STA
2.0 5
Experience Level: Intermediate


Comments: I bought two bulbs. The light being emitted from one bulb is yellow and the bulb is flickering. I was told by customer support to give it a couple of days to burn off the gasses. I may have to return it. It has been several days without change. The good bulb has a nice blue color.


Did you find this review helpful? Yes No




Outstanding! - worth the money

by
Reviewers Rating Excellent!


Posted: 1/7/2013 from CLAREMORE, OK UNITED STATES
5.0 5
Experience Level: Expert


Comments: I have used numerous Halide bulbs during my years of salt water aquariums. These Geismann 20,000 bulbs are amazing!! Sure, they cost more than other bulbs but $36 more than a cheaper bulb is only $3.00 / month. I have used Ushio, XM, Hamilton and other bulbs. These make the others look sick. If you want your corals to POP, you will be very pleased. I combined three of these Halides with the Geisemann 39 Watt blue acntics (qty. of 4). Don't think you can have too much blue. Ver pleased with Geisemann bulbs and won't be buying any other brand..


Did you find this review helpful? Yes No




Great bulb

by
Reviewers Rating Excellent!


Posted: 2/22/2012 from Gulf Coast, FL
5.0 5
Experience Level: Intermediate


Comments: Bulb made an immediate difference over the off brand 14000k bulb I had been using. Corals which were browned out are now vibrant blues and greens. Tank looks awesome. It is expensive, but it's the best improvement for the money I've made to my tank. Highly recommend!


1 of 1 People found this review helpful, did you? Yes No




love it

by
Reviewers Rating Excellent!


Posted: 8/7/2010 from DUNDALK, MD UNITED STATES
5.0 5
Experience Level: Intermediate


Comments: I am extremely happy with this bulb. It has made huge difference in my tank with coral and acutely algae growth it has slowed algae down to where I can clean walls every few days and its still clear blue water...love the light would highly recommend


1 of 1 People found this review helpful, did you? Yes No




Great Color/Average Life Span

by
Reviewers Rating Great


Posted: 5/10/2010 from SPRINGFIELD, OR UNITED STATES
4.0 5
Experience Level: Expert


Comments: I love the color of these bulbs. They will give you nine months of great coloration and growth from your corals. However, my first pair shifted spectrum at nine months and needed to be replaced. 9-12 months is the expected life span of HQI bulbs. Despite the shorter life span I believe these bulbs are worth the extra money.


1 of 1 People found this review helpful, did you? Yes No




Dont Fit

by
Reviewers Rating Below Average


Posted: 6/29/2009 from POWAY, CA UNITED STATES
2.0 5
Experience Level: Expert


Comments: bulbs did not fit my fixtures, and kept slipping out.


1 of 13 People found this review helpful, did you? Yes No




20000K Metal Halide Bulb - Meg

by
Reviewers Rating Excellent!


Posted: 5/19/2009 from OGDEN, UT UNITED STATES
5.0 5
Experience Level: Intermediate


Comments: I love these bulbs! My corals "pop" more than ever, they really bring out the colors. If your in the market for a good 20K light, this is it!


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




This bulb rocks!

by
Reviewers Rating Excellent!


Posted: 7/22/2008 from HOUSTON, TX UNITED STATES
5.0 5
Experience Level: Intermediate


Comments: As the title says . . THIS BULB ROCKS. I was originally hesitant to drop an extra $40 on this bulb but in actuallity that is the cheapest investment you can make to get your tank to shine like that. Over the past five years, I have tried both PFO and Metal Halide lighting with various bulbs and arrangements. None of which compare to the quality of light provided by this 250 W 20000K Metal Halide Bulb. The light is by far the most crisp and clear I have ever seen. My tank has really impressed made me smile in the past but I couldn't help but grin from ear to ear when I put this bulb in. (BTW it takes a few days for the bulb to get broken in and really shine)


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




megachrome 20K

by
Reviewers Rating Excellent!


Posted: 7/7/2008 from CHANDLER, TX UNITED STATES
5.0 5
Experience Level: Intermediate


Comments: I would highly recommend these light, they are great. If you want your coral colors to pop Buy these lights. I had 10K's and they were fine but I wanted more blue, so I ordered the 20k megachrome and I was so pleased. Plus my coral love them. One thing I have to say also, I have ordered from Marine Depot several times and they always have good prices and if you need help just call they are always helpful and have some one who can answer any question you may have about a product. Hope this helps someone who may be wondering about the 20k's. Thanks Tonya Beam


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


of 2
Page

20000K Metal Halide Bulb - Megachrome Blue, Double Ended Window Navigation Prev Next Zoom Close
We value your opinion & experience
Thank you for taking the time to review our products!

This is a Product Review for: 20000K Metal Halide Bulb - Megachrome Blue, Double Ended

First tell us about yourself.

Name to display on the review: Location (ex: Anaheim, CA):
Your experience level:


How would you rate this product?

Review Title:


Write your review:
(Please focus on product quality and performance, maximum 2000 characters)

This item is temporarily unavailable but will be back in stock soon.

Item #
Price:
Click the Add To Cart button below if you'd like to reserve this item today. Any other items included in your order will be immediately processed and shipped. We will ship this item separately as soon as it arrives. We will not charge you for this item until it ships and you will incur no additional shipping charges.

Enter your email address in the field below and click the Notify Me button if you'd like us to send you an email when this item becomes available. Although you will be immediately notified when we have stock on hand, we will not reserve any units for you; you must return to our website and place an order.

Your Email:
Just enter your email address below and we'll let you know when the product you are looking for becomes available!

Item Code:
Price:
Your Email:
If you find a product we sell for a lower price at another online store, we will match their price—today and up to 14 days after you’ve purchased the item!

Enter the price, shipping cost and website address where you found the lower price. Then click the "Add to Cart" button. We will review the lower price while processing your order and make any necessary reductions before your order ships. Some restrictions apply. See Terms & Conditions.

Price *
Shipping Cost *
Competitor's Website *

Please make a selection 
Add to Wish List
Select Wish List:
Comments (up to 200 characters):
Quantity Desired:
Quantity Received:
Priority:
Email Specials
Subscribe to our newsletter feed.
Newsletter Tips & Tricks! New Products!
Discounts & Promos!
Testimonials
Sept 12, 2014
"Great store with all the right supplies for the Reefer."
TCshore

Sept 12, 2014
"Very satisfied with all my purchases from Marine Depot. The ease of ordering to the prompt and quick delivery of merchandise, I am very pleased. Thank You!"
Phil

Sept 12, 2014
"Great site...I order most of my reef supplies from here. And they always have everything in stock."
Smitty

Marine Depot Newsletter Signup
Aquariums, News & Culture
Join 100,000+ readers who receive weekly tips, videos, deals and giveaways.