You can buy 10,000k 1000w and 600w one of those would do it. Just remember the sun glasses. They work it kinda a pain to change bulbs for a week or two but you can tell a difference
Get a 1000watter and you'll grow a pound. Cfl s are slow and are not going yield much so finish up this one and save up for a light. More light = more pot faster, way more way faster