Where you put your lighting partly depends on your set up and how you're planning to grow your plants. But I would make sure I have some above the plant, like the sun.
I used to use spiral CFLs. They worked perfectly for me at the time. I've since switched to regular socket LEDs for the heat and power savings. They're still about the same effectiveness.
My set up allows me to move my lights all over the place. Up, down, left, right, forward, back...