Hello
and welcome
pearson1223
You're going to LOVE this hobby!
I too have a 10g AGA tank that's now a full blown reef tank. It's not easy and it takes a LOT of time. Go slow, read and reasearch as MUCH as you can.
About lighting... take some time to come up with a long term plan for your tank. Once you know where you want you tank to be long term then you can determine what lighting is needed. Here is what I did..
#1 Went to LFS and bought a tank set up which included a simple Pwrfecto Flourscent hood. This was fine for Fish Only! I then decide I wanted some of the easier corals (zoas, shrooms, GSP) so I went BACK to the LFS and paid an addition $80 (way over priced) for a 28x 50/50 coralife fixture. Then recently I eealize I need (read WANT) more light on my tank. I just ordered a coralife fixture that's going to give me a total of 130w of light. I should have taken my time from the beginning and waited to decide how I was going. I don't want to go MH due to cost and heat isues.
If you have any questions please don't hesitate to ask here or send a PM! I would be glad to help you to not make the same mistakes I have!!!
Allen