So as long as you stay way under 12 hours a day of darkness, your plants should stay in the veg state, right? My main timer went out and I am having to turn my lights/blowers on by hand until I replace it. Do I need to strictly follow my 18/6 clock? Or as long as I keep them in the dark less than say...6 hours a day, should they be fine?
The schedule can vary a little, if you turn the lights on or off a half-hour different each day it won't matter. Or, as dohpey said, you can just leave them on full-time. What you most definitely do not want to do is flip the lights on for just a few seconds or few minutes at a time, going back and forth from light to dark in a short period of time.