Anonymous is on the right track about this.

The few controlled studies indicate that static street lighting (not motion detectors or security cameras) can actually increases crime

Since Bad Guys have to see to burglarize a car, sell drugs, etc.

So crime lights could be particularly inappropriate for WR Lake Park - where BMV is the most prevalent crime - during the day

Here's the only conclusive study done on the subject

http://www.icjia.state.il.us/public/pdf/ResearchReports/Chicago%20Alley%20Lighting%20Project.pdf

And reduces school vandalism - when campuses go dark

http://www.peninsula.wednet.edu/conservation/Energy/dark%20campus.HTM

And a list of other studies - which indicate that at best, lights give a false sense of security

http://www.britastro.org/dark-skies/crime.html?0O#aid

[Ed Note: It's also interesting to note that cameras, in and of themselves, do not reduce crime. But signs that say "video surveillance in progress" do! Go figure.]