well, to add on to hank, the sun is the cheapest form of light out there and it's still the most powerful. If you got the weather (hawaii?) then try outside, it's a little slower but hey most of us here if we had hawaiian or aussie weather we'd grow outside. I was doing this same thing with my plant early on, sunlight when I could lights when I couldnt, I found out the light differentials stress the plant, and going from sun to cfl is a pretty big stretch. I would suggest find which one (indoor/outdoor) is best for you and then run away with it. lata.