As far as you know, will those cameras hold up in damp conditions? They won't be in direct weather, but will be under pretty much open shelters. Also "some" low light performance would be nice. These are very close to what I was looking for tho and I really appreciate your time.
The BL C140 and BL C160 are 'outdoor' cameras. Under the eaves, don't hit with a hose probably OK. Mine are in a barn.
As far as low light, try a BL C101 and see if it's for you. Amazon will take it back but I'll bet you keep it. I guarantee you will find some place to put it. The 101, 140 and 160 are the same electronics as far as I can tell.
As an example - if you have enough light to read a newspaper headline but not the body of the article these cameras will give you an image but it will be rather 'noisy' - lots of 'graininess' to it. Your dark adapted eyes can see much better than these cameras.