Well, I made the decision today, and went to 12/12.
I'm going to flower for the first 2 weeks under MH, then switch to HPS. (Hortilux on both)
I made this decision, even though I only vegged for 2 weeks, because:
1.)the plants are growing like crazy.
2.)Being a practice grow, i'd like to get them done before Christmas so I can get going on my "real" grow, now that I have a concept of what I'm doing.
I'm running the lights from 9 at night till 9 AM, which means that I'll not need the AC as much during the hottest part of the day.
My nutes will be:
FF trio+Cal/mag w/open sesame for 1 week.
Upon seeing pre-flowers, I'll continue with the FF trio/Calmag and add Canna boost.
I know I'm going to be cutting my overall yield by flowering when the plants are only 10-18 inches tall, but again, this grow was for education. The next one is going to be for production.