2nd post.Thanks for the welcome. If you know it all nothing else can fit and you act like you know it all. How can you make such a blanket statement, then pick and choose which parts to respond to? A true scientist would know even changing the type of wood, especially the surface of the wood changes the equation. All wood reflect the same? Laminate reflects the same as a real hardwood? I guess you know it all. Now pick and choose what you want to respond to. How about laminate reflecting the same as a softer wood. Take your piece of OSB plywood and do your test on the shiny smooth side then on the rough side. You see, there HAS to be a difference because you have changed the equation. IT CAN"T BE THE SAME. I'm not the only one finding you irrational and arrogant. I skip over your posts now. Probably doesn't mean much to you, I'm probably not the only newb that just stumbled on this thread. I'll be quiet now.