im always missin mine by an hour here or there i have a timer but cos i have some on veg and two on flower i have to move the flowerin ones into a cupboard (only temporary tho)
it hasnt seemed to make any differance to my babies its flowrin nicely
its been on flower for 3 weeks total it already has lil buds (nice)
you should see pistiles form at around 2 weeks then it will grow day by day from then on
natural light at the flowring time of year is never exactly 12 hours it varies between 11-13 hours each day so as long as you dont keep missing it by a few hours it shouldnt matter an hour every now and then
males tend to show after a week or so
full budding should take 7-9 weeks depending on the strain