Click to Verify - This site chose VeriSign SSL for secure e-commerce and confidential communications.
Security Seal
Marine Depot Live Chat Support
Pet supplies, Pet products, and Pet Accessories for your dogs, cats, birds, fish, reptiles or small pets. Pet experts are available to help you.
New Customer? Register | Sign In
Expires in 00:00:00
In-Stock! EcoTech Radion XR15w PRO LED Light
0 items
Your cart is currently empty.
View Cart Checkout
Aquarium Supplies
Home » Saltwater Aquarium Supplies  » Lighting  » Light Bulbs  » Metal Halide  » Double Ended  » 150 Watt  »  250 Watt 15000K Metal Halide Bulb - XM, Double-Ended
250 Watt 15000K Metal Halide Bulb - XM, Double-Ended

250 Watt 15000K Metal Halide Bulb - XM, Double-Ended

In Stock: Buy now and your order will ship the next business day
Item #:
MSRP: $99.95
You Save: $20.96 (20%)
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

250 Watt 15000K Metal Halide Bulb - XM, Double-Ended Information

The XM 250W double-ended metal halide bulb offers good coloration and intensity. The color is between an 10,000K bulb and a 20,000K bulb: white with a distinct blue tint. This bulb will work with standard magnetic ballast, magnetic pulse-start ballast, magnetic HQI ballast or electronic IceCap ballasts. An excellent choice for nano-reefs and other reef tanks 22"–30" deep.
  • 15,000K Color Temperature
  • Excellent with or without actinic supplementation
  • Operate on a HQI metal halide ballast or electronic ballast
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 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

XM Lighting
XM Lighting is the leading manufacturer of high quality metal halide lamps for the aquarium industry. XM Lighting began in 2003 and took the hobby by storm with high PAR levels, high quality lamps, and world class customer service. XM Lighting quickly became the hottest selling lamp in the industry, and they`ve continued the trend by developing new lamp wattages and color temperatures to meet the ever changing demands of the aquarium hobby.
+ Display More

250 Watt 15000K Metal Halide Bulb - XM, Double-Ended Reviews

Average Rating
(23 reviews)
Sort Reviews By:
of 3

Defective, mislabeled or both?

Reviewers Rating Unsatisfactory

Posted: 1/19/2014 from OLD MONROE, MO UNITED STATES
0.5 5
Experience Level: Intermediate

Comments: I purchased the XM 15K bulb predominantly based on reviews and I couldn't be more disappointed. This was to replace a 14K Phoenix that has been performing flawlessly for 12 months. The XM bulb would not fire after multiple attempts even with a dedicated circuit. After 23 attempts I got the bulb to fire after a lot of crackeling and popping and much to my surprise, this bulb is as white as the 4.1k HIDs in my wife's Acura. Clearly, this bulb is DEFECTIVE and/or it's color has been mislabeled. After multiple attempts to fire the bulb again this morning to no avail, I'm done. I promptly put the Phoenix back and it fired fist time as it has for the last year out of the box.

Did you find this review helpful? Yes No

Nice Color Temperature

Reviewers Rating Great

Posted: 4/18/2013 from SCOTTSDALE, AZ UNITED STATES
4.0 5
Experience Level: Intermediate

Comments: I have only been running the bulbs for about a week. I switched from Ushio 20K's. Only problem is that the bulb appears to be significantly more intense than the Ushio (may just be color temperature) and as a result, I have had to shorten my light period since some corals were showing burnt tips. Time will tell. Bulb is very well made and has far more robust insulators than the Ushios. Fit perfectly into my Hamliton Belize fixture.

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

Excellent Bulb for 8 Months

Reviewers Rating Excellent!

Posted: 10/3/2012 from OWINGS MILLS, MD
5.0 5
Experience Level: Expert

Comments: I have been using this XM bulb for 3 years now (changed the bulb every 8 months during mentioned 3 years), and am very satisfied with the stability of the light and it's reliable firing when used with reef timers. For a 15K bulb, they are a bit more blue than one would expect but I enjoy that look. These bulbs especially make fluorescent coral pigments pop when used with actinic T5's, and some Blue LED strip lights. The tank I'm using this bulb in conjunction with is 3 feet deep and I have no issue with penetration for clams and bottom dwelling corals. For their price you shan't find a better & more reliable bulb (in my opinion).

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

72 gal bowfront reef

Reviewers Rating Excellent!

Posted: 8/12/2012 from Sioux City, IA UNITED STATES
5.0 5
Experience Level: Intermediate

Comments: These lights look fantastic. The color gives my tank a perfect blue hue and the corals seem to love it too. Defiantly would recommend these lights

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

XM 15000k best with t5's

Reviewers Rating Excellent!

Posted: 10/6/2011 from Nanticoke, PA UNITED STATES
5.0 5
Experience Level: Expert

Comments: XM 15000k 250 watt metal halide bulbs have the best color to really enhance the color of sps, lps, and soft corals. The exact look of the bulbs are a white color with a hint of blue, they go excellent with actinic blue t5 bulbs, this really makes the corals explode with color. The XM's also go great with 10000k t5 bulbs this changes the spectrum to less of a blue tint but really brightens up the tank with a mix of blue and white from the XM's and a hint of natural day light with the 10000k t5's. Both combinations go excellent with this type of metal halide bulb, it is what the hobbyist prefers.

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


Reviewers Rating Excellent!

Posted: 5/11/2011 from THOUSAND OAKS, CA UNITED STATE
5.0 5
Experience Level: Expert

Comments: Consistent color and is a perfect mix of 12k's and 20k's. I am very pleased.

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

XM 15000K Metal Hilade Bulb

Reviewers Rating Great

Posted: 5/5/2011 from HARPERS FERRY, WV UNITED STATE
4.0 5
Experience Level: Intermediate

Comments: So far this has been an excellent purchase. I really like the new colors the bluish tint brings out in my Coraline and Corals.

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

250wt xm 15k

Reviewers Rating Excellent!

Posted: 3/15/2011 from BRIGANTINE, NJ UNITED STATES
5.0 5
Experience Level: Intermediate

Comments: This is an excellent bulb the bluish white light is awsome my corals and fish are vibrant in color

Did you find this review helpful? Yes No

Nice Bright Wh/Blue

Reviewers Rating Great

Posted: 11/26/2010 from TUCSON, AZ UNITED STATES
4.0 5
Experience Level: Intermediate

Comments: Bulbs seem to be very bright and just the right color spectrum for my tank. I like the blue light and this bulb definitly hits that spectrum. So far no problems.

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

Nice Bulb

Reviewers Rating Great

Posted: 7/10/2010 from SYKESVILLE, MD UNITED STATES
4.0 5
Experience Level: Intermediate

Comments: Like others i bought these to replace my 14k bulbs that i wasn't really happy with. I like these much better, although I think my Candy Cane coral preferred the 14k bulbs. My only issue is that one of the 3 bulbs i purchased came out of the box with some damage to the connector at one end. It fired ok initially, so i decided to keep it.3 months later, i need a new bulb to replace the on with a bad end. Having said that, this will be the bulb I purchase in the future.

Did you find this review helpful? Yes No

of 3
250 Watt 15000K Metal Halide Bulb - XM, 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: 15000K Metal Halide Bulb - XM, 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 #
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:
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.

Sorry! While there is no limit to the number of items we'll price match in an order, our online system will only accept one. Please call us at 1-800-566-FISH (3474) and we’ll happily price match additional items for you.

Price *
Shipping Cost *
Competitor's Website *

Sharing products with friends and family couldn’t be easier!

Just complete the fields below to send your friend or family member a personalized email message featuring the product of your choice.

Your Name *

Friend's Name *

Friend's Email *

Personal Message

Please make a selection 
Add to Wish List
Select Wish List:
Comments (up to 200 characters):
Quantity Desired:
Quantity Received:
Email Specials
Subscribe to our newsletter feed.
Newsletter Tips & Tricks! New Products!
Discounts & Promos!
July 7, 2014
"I have been a customer of Marine Depot since they opened. Always get what I ordered packed properly and shipped quickly."

July 6, 2014
"I was very satisfied with how everything was packaged. Everything I ordered was nicely placed in the box. I will definitely order from here again. Thank you Marine Depot."

July 2, 2014
"Love Marine Depot. All around great company with great service and they have everything you can think of."