Quote Originally Posted by Pepper1
The grow cabinet is small have no room for an hps or heat problems, don't want to use cfl's to many cords etc, want a nice clean set up 1 cord 1 light.
Grow room is 32"wx24"dx48"t Have to keep plants small due to space. Back to the original question if the plant is put into flower at 10" how tall will it be when it comes harvest time? (will be using 9" or 12" pots)
Get a 250 watt HPS hid with air-coolable reflector. Much better yield and about the same amount of heat as the T5. 2 cords (1 for the light, 1 for the fan)

As a VERY general rule of thumb, whatever the height of the plant is when you force flower... multiply that by 2.5 and thats the end height. For me thats been the case, in no way was that an official-scientific statement.