Sure. I've seen a lot of people use emNot sure if this has been done yet, but I found that space blankets are fairly cheap and large compared to reflective insulation, and believe its heat resistant as well. Could this work, and be good for indoor growing on the cheap?
Flat white paint would probably work better. That reflective mylar can cause hot spots. You want refractive, not reflective.
Because anywhere its not evenly reflected it can change the foucs of light, createing a "hot spot".I have to ask you to explain your theory on hot spots from mylar....
I ask because my entire room ( walls, ceiling,floor) has been reflective for almost two years and the only hot spots are the two 600 watt bulbs hanging above the plants. My theory is that the reflection of a bulb is in no way as hot as the light coming off of the bulb its self.
It is simply one of the many myths you read about on the grow forums.
And yes... Flat white paint with titanium pigment added is the best choice!!!
Because anywhere its not evenly reflected it can change the foucs of light, createing a "hot spot".