I am seeking to buy a 400watt hps system and build a grow room out of pvc and mylar. It will be inside a bathroom that has a small window. But what I need help with is styles and differentials to all the 400 watt hps set ups. I am clueless on what kind of heat I will have with the 400, I have seen the sets that look ready for a fan directly on the other end of the socket, is this what I should need?
Thank you