ok - these might be dumb questions, but it seems this stuff comes with no instructions. I've got a 4x4x6.5 grow tent, that part is ok, but when I hung the light -- the reflector with glass (the one with the 6" inline air cooling) -- and it seemed to pull alot on the ceiling of the tent. Is this how it's supposed to be? Also - I got a pair of those light lifters, with the nylon string -- how do those go up? I 've seen them turned both ways, with the string tied to the relfector, and the opposite, the string tied to the ceiling. What is the correct installation on these?