Just having a discussion with my Gf and our mate. They both think that a mirror will distort the heat/light from the grow room, if you stick the mirrors to the outside of our room. Would this actually work or just another one of them 'myths'...
Considering glass absorbs heat, I would say myth. White surfaces will reflect light somewhat. My grow journal http://forum.grasscity.com/indoor-grow-journals/1323166-another-noob-his-first-grow.html