Item Code: 20-15020

* XDE 150W 20,000K color temp!
* An excellent bulb if you do not have supplemental actinics on your tank, and desire a bluish tint to your light.
* HQI - Double ended.
* Use on ANSI M81 or any other ballast capable of running HQI bulbs.
* Will work on Hellolights ARO 150/175 ballast
* Approx bulb dimensions: 5 3/8" L x 1"W x 1 1/8" H. Length measurement is end to end.
* A high quality, well made bulb.
* This bulb seems to burn into a nice white/blue color after about 3 weeks.
* When mounting a double ended bulb, make sure not to touch the outer glass with your bare hands. All fingerprints should be wiped off with a clean cloth soaked with alcohol.

* Do not mount "double ended" HQI type bulbs without a UV filtering glass shield!! This bulb will put out UV radiation which can damage your eyes and skin, as well as your animals in the tank. The bulb MUST BE burned behind a protective glass sheet.
HQI FAQ:
Q. Will the 150W XDE 20,000K bulb work in my low profile Reefstar System unit as a replacement?
A. Yes, as long as the fixture is for 150W double ended lamps.
Q. What does the 150W XDE 20,000K color look like compared to a 150W HQI 20,000K Radium or 20,000K Ushio?
A. We generally dislike questions like this, but, our opinion is that the XDE looks like a "whiter blue" after burn in, while the other 2 look more "blue". The color difference appears very, VERY slight for 20,000K bulbs. These make the HQI 10,000Ks look "yellow"! Remember, though, that color is an opinion, and it's very difficult to describe (since what is "blue" to you may not be "blue" to me).
Q. Why does the arc tube look fired?
A. We test all XDE and XM bulbs before we ship them, thus, the arc tubes were fired. The arc tubes sometimes are left with a silver or smoke look to them, since they ran only a small amount of time, generally less than 2 minutes. The bulb is new, and this dark color generally goes away after the first time you fire it more than a few hours. Over time, most arc tubes turn dark in color at the tips of the arc tube.
Q. The end of my bulb chipped while I installed it. What can I do??
A. Unfortunately, the manufacturer will not accept any kinds of returns for bulbs broken or chipped by the user. With the exception of bulbs broken in transit, we cannot accept any claims on chipped or broken bulbs. We inspect / test all bulbs before they leave our warehouse to insure they are in new condition, and working. Be extra careful while installing these bulbs.
Q. What kind of glass should I use to shield this bulb?
A. Most regular glass will filter out UV rays. Of course, we are not glass experts, so we recommend that you go to your local Hardware Store, Glass Shop or Frame Store to find out which glass will filter the most UV. You can use tempered glass, since HQI type bulbs burn at a very hot temp, but are not required to.