I use motion/heat lights on my outdoor buildings,the better high end lights you can set the detection size and range,so if ya have a rabbit,dog or cat come thru this size will not trip the light,further they led light is (2) stage beam,meaning it has a timer switch,I keep mine on from dust to dawn,then she shuts the light off@ daybreak,the motion light has a low beam on during this time period,like a night light,when something of large size triggers the motion detector she goes on "Hi Beam" or a major heat source will trip it as well.
Oh,and you set the timer for how long you want the high beam on for,I keep mine set for 10minutes which is enough time for me to take notice late at night when I'm roaming around or watching the tube.