@Majiktoker, could you expand on that copper tubing thing, running through ice water? I understand the concept but am not visualizing exactly where the copper tubing is running to and from? Having heat issues too, and in fact just ordered 2 LED lights thinking this might solve part of the problem, using 600 watt HPS now until they arrive but now thinking they aren’t going to be that much cooler. I need to close up my tent in the next few days to start flowering on my Gold Leafs. I can keep my tent temps around 82-84 but experimentation shows me that temps climb quickly up to 91-92 closed up, even with a 304 CFM exhaust fan 2 6 inch fans circulating, intake vent open and bottles of fz 2 liter water being blown on by the intake fan.