As Steve and Justin said - led's are coming. There is plenty of info out there to diy a project. I have been trying to read up and looking forward to helping with a redo of the led lights on my Finnex. I will possibly add some led fixture to supplement light on my 90g when it gets back up and running.
With that said, I have been extremely happy with t-5 lighting. I ran a nova extreme on my 90g - 6X54 bulbs. There are so many combos to run to get different colors and the output is fine for what ever you decide to grow. I would not run t-5s for anything on the bottom of a tank more than 25" unless they are low light corals. That is where other light systems beat t-5.
As for t-5 there are several great systems out there. I am currently looking into the Tek elite and ATI sunpower as an upgrade to my current fixture.
John
"Critics are men who watch a battle from a high place and then come down and shoot the survivors." Ernest Hemingway