Ok so I have pretty much finished building my crossfire enclosure(4*2*2). I am now in the process of installing my fixtures for light. Now I have a UVB Repti-Sun florescent fixture. I also have a porcelain fixture for my halogen heat lamp with a dimmer to set my temps. I keep my enclosures in my basement. There is no heat (per se) down there. I live in the NorthEast so during winter it gets a little chilly down there. I mean not see your breathe but chilly. I want to add another porcelain fixture with a pull chain on a thermostat that could be turned on (when required at night) during the colder months with a CHE in it. My question is where (on which side of the cage) should I add this 3rd fixture?????