I am a new grower and I am using a 24/0 cycle for 6 plants with 8 100w cfl's and 1 175w MH, and my plants seem happy. I'm 18 days into vegging and I've got 4-6 nodes on all of the plants.

My 24/0 is more of a choice to keep the room warm vs. really growing fast, although the plants seem to be taking off the last week or so, as where I live it's well below freezing every night and the grow room is in a garage which is only kept at just above freezing, so I was looking for easy temperature regulation to get started, and possibly faster vegging.

Once it becomes time to flower, I will have to readdress the temperature issue, but I have a couple weeks to figure that out.

Good luck!