I understand that cfls are cheaper and weaker so I was wondering if I could maximize the heat absorbed by the plant by lining all the inside walls of a small closet with mirrors. Does this setup sound safe enough for the plant?
don't use mirrors, i believe mirrors do not reflect as much light as they absorb. use either flat white paint or even better, mylar.
black/white poly plastic is great too. also ive heard using mirrors can create really bad hot spots when reflecting the light. and it reflects unevenly in sporatic directions