In that pic there is 6 plants with a screen that is 27" wide by, 19"deep, divided into 3 parts so one can be harvested every 3 weeks. I have 8 23 watt cfls for light in the flower area and in the vegg area I have some T-8 florous and some cfls in clamp lights. Im making a new cabinet that will have a 150 watts hps and Like 100 watt cfl for the 2 areas. I have been fighting some very high temps, and it's messed up some of my plants, but thats why I like to do a perpetual harvest, its easier to learn on the job. I can get over an ounce every three weeks, which is more than enough for me. But if you smoke more than that, just scale it up and make it bigger. my new cab willl be a v-scrog. this is a plant I have training under the screen