Or you could put a shop light over the tank, thinking about doing that with our 50g, since I hope to end up planting it. 4' shop lights give out and average of 80w if they have 2 bulbs. Plus my 20g tank has less than 1wpg and my sword plant is thriving(could be the flourish tabs). But since I just got another sword and an anachris I'm looking into a compact fluoresent fixture that would give me 2.75wpg.
55g - 1 oscar and 1 red zebra
30g(planted) - 3 Trilineatus cories, 3 peppered cories, 1 female betta, 2 gold rasboras, and snails.
50g - 4 lethrinops intermedius
46g Hex - 2 black neon tetras, 3 bloodfin tetras, 3 blue tetras, 2 snakeskin gouramis, 3 Agassizi corys, 2 von rio tetras ,and 1 pleco