a little advice on ventilation please

hi folks,im in the process of setting up a 600 hps in my new place,its the 1st time ive used a light this powerful,my growspace is about 1m2 and just under 2m high,it gets far too hot in the space and i need a new fan,how much air should i be looking to move to keep the temp in my space at acceptable level? any help would be great

air cooled hood is definitely better. maybe some better specs of what im lookin at might help.

the most ya want is it to be 85 in there. anything higher and youll need c02 to open the stomata. or pores.
below 55 and photosynthesis stops and your pushing it above 85f. and basically youll be stressing the plant.
really not sure what temp as far as being hot will stop growth.

you don't want it at 85, you can look at it this way, every degree over 76 brings down 10% of production.... at 85 you would be getting 10% of your maximum production? Come on, you want to be no higher than 78, and no lower than 72, a nice fluctuating average of 75-76