Like the other guys have said you need to sort out your air circulation. But there's a couple of things i've done to help reduce temps a little. First off change the hours when your lights are on to the night time, say 8pm-8am assuming ur in flowering. (When it's already hot with the sun in the daytime you don't wanna be adding heat with your lights too) I'd say 600 watt is a bit too high for 3 x 3 area, change down to a 400, at least while you have heat probs. The last suggestion depends where your grow is, mine was in a bedroom and above as you'd expect was a loft, covered in insulation, you got it, take up the insulation above where your grow is. Good luck!
hudson88 Reviewed by hudson88 on . grow room is just too hot i hav a 600 watt hsp light in quiet a small grow space it's about 8ft by 3ft by3ft and it gets really hot in there and i need to cool it down quick all my plants leafs are turning yellow is there eny way i can cool it down with out spending much money r driling holes in walls all replys a apreciated thanks Rating: 5