210w of CFL? I would think that is enough for a single auto, but more light is always better. Just remember to keep the light as close as possible without burning, like 2-4", after the first week or two. Seedlings under 2-3 need surprisingly little light.
As for the light temps, the general CFL growing paradigm seems to be using higher temp (like your 6200k) for vegetative growth, then switching to lower temp (like 3000's) for flowering. My auto began to flower after about 3 weeks, so you might want to try swapping some higher temps for lower around then. Or, you can just ADD lower temps and keep that 6200k in.
BTW if you are doing an auto you don't need to switch to 12/12. 18/6 should be good throughout the entire grow.
There are some good thread on CFL growing in the indoor forum if you need more detailed info. Also, there is a ton of material on autos, as they seem to be quite popular these days. Good luck and welcome to RIU.