Hi there. I've just purchased a reflector and need to know how to install it directly to the roof of my grow room. Since I have very limited space I need to basically attach the reflector to the roof of my grow space so I can't use hangers or give away a few inches. I was thinking about drilling it into my roof but there's no ready made holes to do that. What to do?? Please help me as I'm eager to start my first grow soon.