Every plant has a response, positive or negative, to environment. All environments are different; light-light distance-H20-food-wind-etc:
If you try to play by the suggested rules, your gonna lose alot of sleep and alot of plants...
600w in 2x4x6 grow tent. Temp stays at 97 & humidity 25-30% I have no issues with heat and my plants do just fine. Dont try to over think all this grow hype.. Adjust your system to provide max grow. There ARE just to many variables to be scientfic. ALL enviroments are different and yours...