Howdy,
For the height of a 55gal, compact fluorescents are sufficient (Coralife Aqualight Freshwater). Still, light isn't everything. What's your pH, nitrates, phosphates, iron, are you willing to adjust those for your plants, what fish do you keep? A silverdollar will never allow you to build a planted tank. Besides, temp etc. For plant suggestions, please search this forum. It's best to begin with easy to care for plants. You can't pull off a tank like the above as a complete novice. At least not for long. It's experience and how much effort you are willing to put into it.
HarleyK