Yup! Loved my frog-bit when I had it! It grows just as well as duckweed but doesn't take over your tank as quickly and easy to remove when needed ^_^
Fluorescent is a good start! Basically we need the kelvin rating but sometimes it doesn't say on the bulbs. What you're usually looking for is a Kelvin raiting of 6,500K. This is the color temperature of which the sun is at in its peak on a nice sunny mid-afternoon day which is the best time to grow plants. But 6,500K and anything higher will do. For small tanks this can sometimes achieve high lighting but for large tanks like yours, it may get to Medium lighting situation but you should be able to grow all low light plants like Java Fern, Anubias, Water Wisteria, Water Sprite, Anacharis and more.