MegaChrome Crystal 17500K - Single Ended Bulb

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Product Name
MegaChrome Crystal SE 250w 17500K

SKU: 209665

In stock


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The MegaChrome Crystal bulb is quickly becoming the most popular and successful bulb for metal halide fixtures. Balancing on super bright white light and providing a deep blue coloration that helps the corals fluoresce, giving your corals the best look they can. With a full spectrum, the Crystal bulb is optically white while having a majority of its spectrum in the blue and violet range.


Choose From:

  • 250w SE M80 (mogul)
  • 400w SE M80 (mogul)


Many public aquariums and research institutes rely on Giesemann lamps for their color stability, balance, and long lifespan. Being made in Germany gives Giesemann the most control over how their bulbs are produced guaranteeing the best quality bulb you can find for your saltwater aquarium.


Available MegaChrome Lamps:

Marine - 12500K - Emulates shallow reef lighting for great growth of coral

Coral - 14500K - Great white coloration focusing on a subtle mix of blue while still providing good growth and fluorescent coloration

Crystal - 17500K - Optically white but gives off peaks of blue and violet to help give the best coloration and growth

Blue - 21000K - Emulates deeper waters with a deep blue spectrum and very little red and yellow light produced

More Information
SKU MegaChrome-Crystal-17500K-Single-Ended-Giesemann
Out of stock message DISCONTINUED
Lighting Type Metal Halide
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Product Questions

Can i use this 17500k crystal with a 400watt Lumatek Electronic ballast?
Question by: John Cuperus on Jun 20, 2016, 10:36 AM
Certainly will work! Feel free to let us know if you have any further questions!
Answer by: Connor on Jun 21, 2016, 5:32 PM
The Giesemann 17.5K looks like a great bulb based on the customer reviews. But the issue about the proper ballast has me concerned. I use a Lumatek adjust-a-watt ballast with settings for 250/250QHI/400/400HQI. Will this ballast run this bulb properly or will it be "yellow tinged" as some people have observed?

Thanks, John
Question by: John Weistroffer on May 29, 2016, 11:58 AM
Great question!
With a Lumatek you will not experience the yellowing of the bulb. We have found these work great with lumatek and Luxcore ballasts. Feel free to let us know if you have any further questions!
Answer by: Connor on Jun 7, 2016, 12:56 PM