HIGH ALL! I have a 600 watt HPS that needs to go in a 4x4x6.5 grow tent. Im going to order a fan and filter and ducting, but am wondering if anyone has ever placed the light on the very top of the tent and made an opening the exact size of the vent hood in order to keep the heat down? Any help and tips on running a 600 watt would be great. Its my first go around with an HPS and the temps get crazy.