I read that you can increase your yield by flowering at 13/11 or 14/10 instead of 12/12 ..anybody had any experience wth this?
Someone lied to you then. the reason you put them on 12/12 is because anything longer then that will keep them in vegitative growing stages. 12/12 induces horomones into the plant that causes them to flower. only way to increase yeild is increase the light available to the plant. Yield is not effected by light cycles. whacking around with photoperiod will only lead you to hermies Hope this helped
check out www.overgrow.com ... they have a guide that shows how to manipulate photoperiods to influence growth .. but from what i hear .. tis not worth the trouble...