Well, the spectrum is good and you still have what amounts to 2 wpg so you should be able to grow some pretty decent plants without having to resort to using CO2. Post some pictures when you've had everything running for a while.
I forgot to ask, do you have a full battery of test kits? You'll want Ph, both gh and dh hardness, Nitrate and probably Phosphorus. Have you given any thought to your fertilizing regimen?
You'll want to monitor Phosphorus. Excess amounts are often the leading cause of algae problems. KH and DH are good to know as well, in fact they are vital to know if you ever do decide to supplement CO2. I would recommend This kit for hardness and This kit for phosphorus. Check out Greg Watson for your ferts. Less than $20 including shipping will get you a nearly lifetime supply for a tank your size. Also check out Rex Grigg and Aquatic Concepts for more in depth details on planted tanks. I got to warn you though, if you get the hang of this planted tank stuff you'll never be able to stop yourself. The epitome of fish keeping (IMHO) is a nice planted tank, even more than reefs.
