Unfortunatly, you do not really have enough lighting to support any type of light-dependant corals. Your options are going to be pretty limited. As I mentioned in the linked thread, you can try a sun coral (pic in my gallery of one). It is a beautiful coral and does not rely on light as an energy source. It just needs to be target fed three times a week.
Some people are like slinkies...they serve no real purpose yet can still bring a smile to your face when you push them down the stairs!:p
Have a great day! Brian