I understand your thinking altw. lowering the flower time from 12/12 to 10/14 will produce a fast finish but at the expense of smaller yields. the 12/12 is the maximum amout of light to trigger flowering. maximum light is necessary for maximum growth, which is what we are all looking for. less light=less growth
If a faster finish is what you're after , try a strain thats done in 45 days or less. i see what you looking for and shorter light times isn't the answer.
peace
heart