I don't have any particular experience, but I think that you've really touched on something big, which is the need for lighting around the property. I'd also suggest that there is an open thread about Video Surveillance systems at the link belowWanted to see if any members here know of any sites or have info on organizing church security , tips , advice , whatever .
viewtopic.php?f=82&t=82020
It goes way over my head, but clearly we have some very knowledgeable people on this forum on how to install a camera system.
Last year my church had someone who broke in through a back window and stole the church van. It was never found. Had we had a camera system we'd have had a better chance to catch the guys who did it. As for security personnel, we're too small to hire guards. I could see having a handful of men who understand common security responsibilities and how to respond to certain types of threats, however without proper certification volunteer security personnel can not be armed.
post edited after seeing the previous topic about volunteer security.