Ya man your girls look good keep up the good work.. (all being said when light go out at 12am they will not come back on till 6pm next day 18hr off is this ok) ya dude this is fine most growers including myself leave the lights off for 24hr before switching 12/12 this speeds up the flowering process so you will be fine. in my first grow my timer craped out for 3 days before i noticed and my plants where fine and still produced some good ass bud..