BIGEYE said:
Is there such a thing as a CCTV camera that can give crisp clear images at
night. Clear enough so that people can be recognised at a rang of about 20
metres.
Absolutely. All depends on what you're willing to spend. Don't expect
a $50 Costco "home security package" to do the trick. Something with
good low-lux performance and a really fast (ie. large-maximum-aperture)
lens are preferable. A motion-triggered floodlight on the area is a lot
cheaper and probably more effective though, for both capturing the image
with a cheaper camera, and for simply "discouranging" the vandals in the
first place.