I am in the process of building a DIY cooltube. http://http://forum.grasscity.com/grow-room-design-setup/184802-diy-best-cool-tube.html I have a 400 watt HPS (htg supply), i have pretty much everything i need to build and complete it. My only problem is that i dont know a thing about how or what to do with the ground wire, right now the wire is attached to the socket fixture. in order to make the cool tube i have to remove the socket from the fixture. thus i have to find a new place to mount the ground wire. where would be the best place to do this?