First grow. Need some help

How do I start my own thread thing? I dont have alot of money so I am trying to go with the cheapest setup that will still be successful. i just started 2 plants, they are about 3 days in and have sprouted but i dont know if i have enough light. I have a 75 watt fluorescent tube that im using but im not sure this is enough. any suggestions on what to use that isnt very expensive that will still be good? i was thinking about buying two CFLs (one for each plant) would that be enough light or would i still need more? or maybe another flou tube? im not sure what would work best, but something that wont cost me