My 2nd grow, I got a total of 300 watts including the fan + 250w when heater is used. Haven’t needed it yet. Nice cheap setup, very low energy. My grow rooms total watt’s is equal to a computer tower. I have Nine 6500 Kelvin CFL’s and three 2700 Kelvin CFL’s for the vegetation cycle, vice versa for the flowering cycle. 100% organic products used! Starting from the far left by the water gallons/heater Indica, Indica, Ruderalis, One week old baby & Indica then we got In the right blue cup 3 cucumb