i have 3 plants of northern lights growing in soil under a 400watt hps that are around 4 feet tall. So i have about another foot i can raise my light before it hits the roof anyone know a way to keep them under 5 feet tall over the next 8-9 weeks of flowering. o ya and they have already been topped
you could always try and LST them. That way the lower branches will produce high yield as well. Good Luck!
I saw one guy who managed to gain some extra inches by tying his plants down.. I'm not sure how much flexibility you have left in your branches at their current height but what this guy did was make small holes around the top of the container then tie doen the tallest branches as far down as they'll go.