One thing about "Security Lights" I would never call them that.
Many years ago I took the stand against that term.
I would explain to customers that I preffered to call them "Courtesy Lights" - simple reason I see the prime reason to install them as to keep you safe by making you ablle to see in the dark and not have an accident.
With any basic lighting system that`s what we use any lighting for primarily.
We might wish to try to deter Sykes from entering our property and stealing/damaging our goods and the first basic line of defence is to make them be seen and/or be heard if they try and if they realise that they may decide to move on to another property to reduce their risk.
Ok in populated areas but not much in others, it may alert us if we are on site or it may not.
But I always cautioned one thought to consider - lighting can sometimes have the opposite effect - Sykes comes and looks and cant see so he brings a torch, but you had the courstesy of assisting him with adequate lighting so he walks around casing the joint more easily and with little or no risk of being seen.
I used to get scoffed at by trade and by public until one day there was a nice big theft at a property about 30 miles away from me - a tyre depot had a massive burglary from their compound on the blind side of their building, traffic passing by the front constantly, maybe police cars too.
A team of Sykes with a wagon raided the lot and were no doubt helped by good vision being provide by the lighting system.
I was no longer laughed at.
If your property has a good chance of being viewed by the public a lot of the time then that makes you more likely to be safer than if there is little chance increasing the risk.
Basically, lighting often makes you safer but often might increase your risk of theft.
Always consider both effects before deciding!