Hello, how are you gentlemen? Doing well, I hope. I ask you to sit back, and consider the following. Mylar® is a trade name for a material from DuPont that consists of PET(polyester) fiber. Reflective Mylar® is made from aluminum deposit or technically is metallized and here to Mylar (polyester fiber). Foylon is foil laminated reflective material. Pretty much aluminum foil on fiber mesh. And is generally said to be superior to Mylar. Mostly for durability reasons. Aluminum foil is typically nearly pure aluminum. Aluminum foil is often claimed to have 50%, give or take 10%, reflectivity. Yet it is also claimed to create hot spots. This is counter-intuitive. IR light is treated similarly to visible light. They are both the same 'material'. Aluminum offers 95% IR reflectivity and 90% visible reflectivity. So if the 95% is enough to 'cook', the 90% is enough to grow! See: http://images.google.com/images?hl=...uminum reflectivity&um=1&ie=UTF-8&sa=N&tab=wi Yea, ®, you're paying for it, I'll include it! How does a supposedly poor reflector create hot spots? It just doesn't make sense. Why are the most suggested reflectors the same essential surface as aluminum foil? Aluminum itself! Think for yourself. PS. You may also want to look up the material safety sheets for Mylar. Apparently it supports combustion. Unlike aluminum foil.