Run on standard hqi ballast only (ie: PFO, IceCap or Sunlight hqi or Electronic)

* XDE 250W 20,000K color temp!
* HQI - Double ended should be fired on an HQI ballast (ANSI:M80).
* A high quality, well made bulb.
* Approx bulb dimensions: 6 3/8" L x 1"W x 1 1/8" H. Length measurement is end to end.

* 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. * Extra care should be taken while installing any 250W HQI lamp. They can be very tricky, requiring equal pressure on both ends as you insert into the sockets.

* Warning: Be sure you properly position all 250W HQI bulbs into their sockets. If they are not installed properly, they can cause an arc that will melt the metal contact(s). We cannot warrant such a failure, should the bulb be placed incorrectly into the socket. Please be aware.

* 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.