I got one of the new Coralife Freshwater Aqualight T-5 Double Linear Strips for one of my 20 gallon planted tanks. It comes with a ColorMax full spectrum bulb and a 6700K plant bulb. I think it does a good job for the price and with the two bulbs the lighting looks very natural. Here is a link to the manufacturer's web site in case you are interested.
If you already have your light fixture then of course you can just buy the bulbs separately.
Gene Heitman - 12 tanks (11 freshwater and 1 saltwater), 206 gallons, 20+ species of fish/shrimp/snails, 52+ species of plants ... 10 years ago I just wanted 1 tank with some fish