In the light scenario, I'm really referring to criminals moving around unobserved and undetected but if needs be, at least placing them on the back foot if a confrontation should occur. Colmcille I don't want to get into a dog debate here other than to state, for the benefit of those that may not be aware, guard dogs (not a dog accompanied by an owner/handler but rather as suggested, roaming in the area the criminals entered) are easily dealt with using non lethal methods in certain circumstances and it's simple but I'm sure you know this. I suspect you know how to use a dog to deflect a threat. Disregarding service dogs, average homeowner guard dogs are best kept inside buildings or in an area where criminals can't get to them easily until they've raised the alarm. Dogs are probably the single most effective crime deterrent for homeowners in the right circumstances and your Shepherd sounds like one of them.
Before the advent of LED lighting I would never have written my post above but LED opens up new possibilities and security service providers should keep an open mind. I can stare at a 400 watt halogen or sodium lamp from a distance and not get too distressed. I cannot do the same to an 80 watt LED from the same distance.
