Security Cameras.. just asking

I have 2 security cameras pointed at nearly the same area. One points from the far side of my porch across my front door area, the other from the other side of the porch at the driveway. They both look at the driveway, just one from farther away. They do not interfere as far as the IR illumination. It is really just a low light intensifier. The only thing that interferes with the motion detection is the cob webs as mentioned by Rover_Bill. I also have 2 true Infrared cameras with 3 more to mount. These are way better than the ones with IR lights as the can not be seen at night. The red lights light up and an intruder can see you have them and where they are. The other ones have no lights, can see much further and see everything from a person to a mouse. Although more expensive...