After being seriously dissatisfied with my yield under 150 Watts of CFL's I decided to step my game up to a 600 Watt HID/25 gallon DWC Bubbler. The Setup: I've converted my sliding door bedroom closet into a grow box. I've set up the 600 Watt HID approximately. 38 inches above the DWC box. I expect my fully grown ladies to reach 18 to 24 inches in height, so there should be about a foot between the mature plants and the 600 watt. The DWC: 25 gallon Sterlite container with 12 3.5 inch net pots. Sure To Grow foam cubes and hydroton are used as the grow medium. An Active Aqua 7.8L pump & an Active Aqua 8" Round Air Stone provide 24/7 oxygen. I'm holding between 65-73 degrees in the nutrient reservoir. If temperatures rise above 75 I have a few syrup bottles filled with frozen water that I can use to cool the soup when necessary. Ventilation: primary venting comes from the closet door staying open during the daylight hours. I'm also running 4 fans in the grow area. Two "whole room" fans are positioned in the closet. One fan is above the light on a shelf pushing air towards the open closet door. The second whole room fan sits on the floor angled to create air circulation in the area below the light. I also have this fan facing the open door. One high velocity floor fan is pointed toward the back wall beneath the light. I did this to increase the air circulation in the area between the light and the DWC. The last fan is a plain oscillating fan on top of a dresser that sits just below the a/c vent. I've managed to maintain temps between 77-83 in an upstairs bedroom closet during the summer. The Nutrients: General Hydroponics Flora Nova Series. Seeds: Dinafem Feminized Power Kush, Critical + and CA Hash Plant. After germination of 6/8 seeds I started the DWC Sunday...hopefully it all goes well for me.