Indeed - if you can stand the light going on every time a raccoon or dog walks by...
Like others have said, there's old fashioned flash, infrared and low-glow red lights that ARE noticeable by people and most animals, and the newer and more expensive 'no glow' or 'black flash'. I have one (Reconyx) and it works well. I want to use it for trail monitoring, but the wife doesn't want me to move it from the driveway. Have got a few suspicious vehicles day & night. Also got the cleaning lady coming & going in the span of an hour while charging for 3!!!