What do you need to know?
I've got a 10 gallon tank with 3 cheapy aponogenton bulbs from wal-mart with a 15 watt bulb. Don't laugh. If you saw the leaf size, it would blow you away! They take up the entire tank. One bulb has 24 stems shooting out of it. Leaf width is about 3", length 8-12". No fertilizer, no chemicals, nothing. Just 2 blue gouramis (breeders), 1 female platy, and a ton of fry. This is the cheap route...