Redid my security lighting again.   I suppose I'm a bit obsessive that way but I'm satisfied now.  I replaced the garden lights with brighter, solar-powered lights mounted on my house corners for $120.   Their solar panels and batteries are 3X larger and coverage is 2000 sq ft so they act like a zone coverage.  I left a few strategic garden lights in place.

A fully-integrated system would be nice but it would cost at least 10x more for the equivalent coverage and I'd be locked into a proprietary scheme.