Well you will get alot of different opinions on this site because there are thousands of different ways to grow. Some people go to 12/12 when plants are 4-6 inces and some like to wait untill they are 4 feet to switch them. Like I said I flowered mine at 12-14 inches and they did great. You can look at my grow in my signature, they were NL under a 600w light. Have your buddy take a look at that and see if he likes what I turned out with. But remember he wont get as much because he is only running a 250w light.
Well I have a 3ftX4ft grow room about the same height and 13-14 sounds about right. I was running a 600w light and five gallon buckets on 6 plants. I got over two oz's per plant dry on my first grow so I was happy. My plants doubled in size but that is dependant on the strain. If I were him I would flip them now. did he top or fim them?
howard did you top yours??
before flowering he must turn off the light for 24 hours and then put the plants for 12/12 hours ???
and you have 10 plants,my friend has 5 plants,so the 250 watts may be enough for what he has...
nice ill def be topping then i checked out your grow nd its pretty sweet did you get the lst down??