I think the stickies and general browsing in the lighting forum would be a great place to start. I can tell you this much-if you put as much light over a planted tank as you would a reef, you'll have a sweet algae farm in no time. I myself came from reefing and made what I assume is a common mistake-way too much light. I learned the ropes quickly thanks to the fantastic knowledge base here...I'm sure you will too.
As for your tank-there are a few options. I myself think a desk lamp with a 10 Watt spiral for that size tank would be ideal, but that depends on your aesthetic preferences/etc.. Whatever you do, start with as little light as possible and increase it if you deem it necessary after a few weeks.