I just use a regular 4' fixture with two 40watt tubes. I did go ahead and speand the money ($7-$15 each) for to full spectrum tubes but you really don't need them.

Cool cool cool is the answer. Warm is no good unless you use just one in a 4 tube fixture, then go 3 cool and one warm. You are just getting them to sprout roots then veg a bit.

Now the cfl I have not used

GL