I have a need to catch 2 legged critters in the act of trespassing and/or damaging property. I think I can get what I want by hiding a trail camera on my property...one that is obviously motion activated. A couple questions: - Are the infrared led's visible to human eyes? I am sort of thinking that with animals it would not be an issue, but believe there may be some level of visibility to the human eye - Would the motion activation work in the dark? Again, I think if it is a quality product it should work fine, I would just have to know the approximate distance able to be sensed. - Anyone with any similar use that can share their insights? Thanks all!