I am sorry to say I don't have an answer for you. I also have Casablanca fans in my house. I am interested in the replies you get. I did some preliminary research and thought Casablanca uses it's own mount so it does not use a standard light kit mount like so many others.

I think I read that on one of the big ceiling fan websites. After reading that I went to ebay and found the cost of the Casablanca lights kits to be really expensive. I will probably end up buying new fans with light kits.

I retrofitted an old Casablanca fan with a lighting kit from Lamps Plus. They don't guarantee that their light kits will fit all fans but it worked fine for me and they have a good return policy so if it doesn't work you can always send it back.

You can also buy Casablanca fan lights separately. I found them at a local lighting store but not online. I just didn't like any of the lighting options they offered which is why I bought a generic lighting kit from Lamps Plus.