hi im new to growing indoors my grow room is 3ft square and 5 and a half ft from floor to ceiling 6ft at the deepest my light is a high pressure sodium (son) universal burn 600w ( 2000k ) spectralight i have a exaust fan taking the heat from my light hood out of the grow room with lots of cold air vents i have 2 fans running in my grow room it was sitting high at over 90f but managed to get down to between 88f and 92f after fitting some plain glass under my light iv left some spaces at left and right of glass to let cold air up can anyone give me anymore advice