I'll try as much as I can using these link.
Glass top : http://www.drsfostersmith.com/Produc...amp;in_merch=1
Light fixture : http://www.drsfostersmith.com/produc...amp;in_merch=1
Basically, you use 2 light fixture on the glass top.
You can get both item at fish store or Petsmarts.
BUT, since you don't have anything yet, you may follow Digger suggestion by using Compact flourescent light. You just buy the fixture and it looks like : http://www.marineandreef.com/product...ight_53000.jpg
It doesn't cost much at all.