I agree with snoogs and grumpy...way to many variables. I've noticed that the deer look at both my IR and my flash. I think on the flash it's just coincidence or it got them on the first flash and they are just looking at it when it hits them again...that cudde is so fast there's no way they know it's coming. On the IR it takes my LR a sec for the red lights to light up a little which is just enough time for them to see it andlook up at it. They defintily see it though. Does either spook them. I don't think so for the most part. I've gotten quite a few big bucks several times over different days and none of them seemed to mind any.Not saying it doesn't spooksome of them but most of them it doesn't bother for the most part IMO.Here area couple of pics of deer looking at my IR. Big buck and doe are at my lease in AL. The other buck is behind my house here in FL.