And if the site is a pathway or parking lot, garage or campus green, it's bad security and, thus, bad facilities management.
Lighting plays an obvious role in exterior security.
But it is not as easy as flicking on a few flood lights after hours. As might be expected, brightness is a crucial factor in security lighting, but only up to a point. Such were the results from a test conducted by LRC, which asked subjects to rate the lighting of 27 commercial and residential nighttime environments for their value in terms of security. Once you get past three footcandles you get diminishing returns from more light. While brightness is perhaps the first thing people will notice, and thus be calmed by, uniformity of exterior lighting is equally important.