Hello! This is my first post ever, and I am beginning my first grow ever with a Wonder Woman Feminized strain. Anyway, I will get pictures if someone requests them but my question is about light insulation. So I have a really cruddy shower that I haven't used since I moved into my trailer (about four years... Where has the time gone) I have been thinking about where to grow forever and when I was taking a dump, it just dawn on me - The friggin' shower! I have invested in some good lights and everything. When I was looking at the shower though, I was wondering if I needed line the shower with anything reflective. The shower is the typical for crappy trailers, cheap plastic with an extremely cheap glass/plastic door (I really don't know which it is) I've read that Tin foil/aluminum foil is bad, but I think I read that Mylar is ok. Amazon sells some cheap, large Mylar Blankets and I was wondering if I should buy some of that? Also, the shower has about a 2 foot clearing about the ceiling, should I enclose this as much as possible or leave it open? I figured leaving it open would be good for circulation. To summarize, line the shower with mylar or other? Leave the opening for circulation or enclose that with mylar too? I'm sure you will see me on this forum again soon with more questions.