What kind of adapter do i need to go over a light in a pool to hook up a polaris 65?

Question:

Answers:
Is it the Aqua Luminator? If so, there's a picture of it here:

http://www.bestbuypoolsupply.com/aqua-lu...

It's the item on the top left of the picture. Leslie's used to carry them when I was there, but upon searching for it quickly, I can't seem to find it separately online. The one in the picture clips over the existing fixture and the hole on the bottom has the 1 1/2" threaded fitting the the Polaris UWF will screw into.