Hi, Note that if your growing photodependant plants when you switch to 12/12 schedule they will at least double the size. Use this note to predict how much veg you can give without compromising flowering due to not enough space. Look at you plants imagine they double in size - can they fit there? I would lower the net to the max height before the pre flowering stretch and when they hit that level I would switch the light cycle. That way when they stretch you can accommodate in the net making it more horizontal than vertical from that point. At this point you can expect really big plants if you switch now.