Hello Zandor. In a C-13 Cabinet you can fit two medium or large Indica/Sativa plants in five gallon nursery pots or ten small Indica plants in one gallon nursery pots in there comfortably. In my case I have a closet sized 8'x3'x1.5' almost the same size as a C-13. In my setup I have a 18x6 inch square hole cut into the closet door and covered with an eave vent. Near the top of the door I have a 4x4 inch square hole cut and on the other side is a Hydrofarm Active Air 180cfm exhaust blower forcing out hot dead air. So basically my exhaust fan is pulling all of the heat out of my grow room creating a suction while the 18x6 eave vent is pulling in fresh air. I use a 400watt HPS with an Eye Hortilux bulb and an 16 inch batwing reflector 12 inches over the plants. The room is also covered in Mylar from celing to walls with flat white bathroom tile covering the floor. Two Honeywell wall mounted fans one over the other on the left wall cool the room and two digital thermometers/humidity gauges are mounted next to the fans at different heights monitor the grow room enviroment. In addition I have a Black&Decker electronic pest detterant device installed to curb most insect infestations. Also I use an ionizer to repel cannabis odor by attaching itself to the odor molecules and forcing them to drop to the ground where I can clean them up periodicaly. For the plants I use Ocean Forest Potting Soil with General Hydroponics Flora Series Nutrients and SuperThrive growing two White Rhino plants in five gallon nursery pots. My typical yield for this strain is six to eight ounces per plant of premium cannabis. Hope this was of help Zandor.