my plants look like they are at a rave party....but with out the X or glow sticks. lol 24/7 fans on them. im in a 4x4x7 tent with a 6" 250cfm intake fan, and 3 5" clip fans on the adjacent tent support bars, aiming directly on the plants (mid way to the tops of the plants). fan speed is on low. i have 7 plants in 3 gallon pots, and 4 plants in 1 gallon pots on the side of the tent, and 1 4" seedling tucked in the corner out of direct fan blowing and out of the 600w direct light. i wish i bought the oscillating fans, but those were 30.00-60.00 a pop. i paid 10.00 for each 5" clip fan, and does the job.