flowering

For autos, no, but it might stress them. For photos, they will reveg. I recommend against this.

Yes, without knowing if it is a photoperiod plant or an auto flowering one, no real advice can be given, other than to say if it is a photoperiod plant, going back to 20 hours would stop flowering and eventually your plant will resume vegetative growth, with added problems no doubt. But if it is an auto flowering plant, you really should have it at an 18 hours lights on and 6 hour dark schedule for best results. Hope this helps,..... Organoman.

Hi Mate, If it's an Automatic plant it's probably no problem. If it's a photoperiodic plant, she will re-veg. Your plants need a certain time-table to switch and stay in bloom. Hope this helps a bit, Servus✌️ OimRausch