Whereas good outdoor lighting (floodlights) are a known deterrent to crime... cameras that are not seen provide NO deterrent.
I'd be interested to know your source for that statement.
Actually, there are DOJ studies that show that crime is NOT deterred by lighting... and in fact may make it more likely. As a personal anecdote, my grandfather's tack room was robbed... and all the outdoor light on the barn did was give the thieves better light to work by :/ Check out
www.darksky.org for specifics (and by the way, the IDA is NOT against all lighting or even most lighting... their crusade is against bad lighting that either wastes energy, doesn't do its job, makes things worse, or all three).
Regardless, it's for sure that BAD lighting is much worse than no lighting at all. Why? Because if your lighting provides "pools of darkness" and glare for the perp to hide in, then you are in trouble. The perp can easily see you, but you cannot see them, because your eyes are shut down from the light, while theirs are adapted since they are in the shadows. Next time you are driving around town, take a look at the parking lot and other lighting, looking for dark pools and bad glare in areas that are supposedly "well lit as a deterrent to crime". Once you actually look, you'll be surprised. 98% of ALL lighting projects in this country were laid out by people with no real clue as to what they were doing, because there wasn't ANY standard for lighting designers until about 8-10 years ago...
Back to CCD vs CMOS, yes, CMOS is cheaper, but a CCD camera has over 2x the range and lower noise, so you do get what you pay for, especially if the cameras in question are for night use. I agree that everyone needs to make their own choices, I was just trying to provide some information concerning the differences in the two technologies so folks who might not know the difference between CMOS and CCD could make a more informed choice...
Regards,
--Lee