Hi there Buzzedlady,

I've just done a grow so I will try to help...

1) 6500k lights will work but 2700k is better, if cost is a problem - try buying one a week or something and replace the 6500k's gradually, it won't hurt them. I read that some dutch growers use 6500k all the way.

2) Plants need more potassium for flowering so NPK - 10-40-10 is good, but build up to max strength gradually say add half what you should for the first two weeks or so, then build up to max dose so as not to shock the plants - also some people stop the nutes completely two weeks before harvest.

3) Sure - I had my fan on the same timer as the lights so it was off too when they were sleeping. (keep an eye on the temps though.)

The best of luck
Hall