- MegaChrome Crystal 17500K - Double Ended Bulb - Giesemann
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.
- 150w DE HQI (R7s respectively Fc2)
- 250W DE HQI (R7s respectively Fc2)
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
Burnt out after 6 days By Richard on 1/8/2019Richard wouldn't recommend this product to a friendFirst off, I absolutely hate the obnoxious yellow color of this bulb. It could be because the bulb was defective but the Hamilton bulb that my Cayman Sun came with was much more pleasing to look at. Six days after installing the bulb it failed and now I'm at the mercy of Coralvue to approve a warranty claim. Since I'd rather have teeth pulled than change a DE MH bulb, you can be assured that I took every precaution not to touch the bulb during installation. The Hamilton bulb only lasted 6 months but they replaced it with a pro-rated bulb (however that works). Figured I'd replace it on the 1st of the year with the Giesmann I had on-hand but now it looks like I'll have to re-install the Hamilton bulb. Before ordering my Hamilton Cayman Sun fixture, I read several reviews that used the term, "bullet-proof", which the support guy at Hamilton used last summer. Why is the fixture burning my bulbs out if it's bullet-proof? I have a 400w mogul fixture from the late 1990's that still fires up with a bulb as old as the fixture. What gives? I'll buy another Chinese black box LED fixture before I spend another hundred bucks on a DE bulb.