this is my first grow bow...i constructed it out of two rubber maid bins topped 2 gether.. i have 2 exhaust fans.1 6inch ,and a 120mm fan, 3 intake fans 2 120mm and a computer fan, all are syliconed in, i have 9 cfl bulbs 3 30 watt,4 26 watt,1 42 watt,and 1 23 watt bulb..i painted the inside...