Enjoy the hobby. As a noobie myself a year or two ago, I have to warn you it gets addictive!!
I have one of these lights over my tank
http://www.ebay.ca/itm/Dimmable-165W...YAAOSwPCVX-Hik
I had it over a 10 gallon at first and it was way more than enough light to grow anything. Currently have it over my new set up and everything is growing well, sps, lps zoas etc...