Cfls are generally pretty terrible, you need to use reflectors and they have about a 3 - 6 inch effective range.
Autos are vigorous, they hit the ground running you need to give them enough light to grow. If you stall them now they won't amount to much as you have a very limited veg period. Mine get 90watts of led from sprout.
I'd go so far as to say the veg period for autos is the most important part of the grow.
I`d second that by saying, getting auto`s to veg is the most important part of the grow, as they are keen to flower, long days help if you struggle with plant size then find some that have more sativa in them as they`ll grow more during flowering and still give you an ok size plant
I don`t like to feed autos much at all till they get to a good size
start 5 to 10 in a block of rockwall when the 1st 3 start getting their roots to the bottom cut up the rockwall by then you`ll have 3 to 8 we call "keepers" and normally 2 to 6 you can stuff in one pot together
My mate calls them small ones "timmy's" as they are the special ones, auto`s are more likely to be retarded then your average plant
Sometimes its better to just pot up 5 in a big pot and pull out the 3 or 4 smallest ones
depends what your paying for your seeds and how many runts you seem to get