Quote Originally Posted by Rusty Trichome
What are the temps while the growlights are on? That will help determine your future actions.
Keeping them between 75 and 85 is optimal, but can be fudged in either direction by a few degrees. Keeping them off of the bare concrete is important, tho. They prefer warm feet.

Is the insulation getting old and friable? (does it break-off from the insulation, and float around the room when the fans are on?)
I would say 77 with everything on, and 72 off, but the room isn't completely sealed yet. As far as flooring goes, its black plastic covering dirt; not cement.

Insulation is still sound but it is kind of bulky and makes it hard to manuever when visiting. The fan grill has little white fibers which I would assume are from the insulation. You agree that white plastic would be a win win?