Also, how far saway should the light bulb be from the plant? I'm using a:

MiniSun 65w BC B22 Energy Saving Daylight CFL Spiral Bulb

Colour Temperature: 6500K
Equivalent to a 325w standard bulb

It was approx 30cm away for the first day in my new grow box but then i read online that CFL's need to be about 2-4 inches away from the plant which i thought was very close, but apprently thats what everyone is saying. I guess its to do with the heat emitted from the CFL bulb. So now the CFL bulb is 3 inches away from my plant with a little usb fan blowing at the plant about 5 hours a day.