Thanks "Hornydragon"
OK..well that has set the upper benchmark !!

It does however appear to be a bit more than I need and would seem to be able to control most the the rest of the house/street!
Any thoughts what would be the lower benchmark and I'll then work upwards!!
To add more detail on need... I would like as a basic procedure to simply activate the driveway lights at a pre-determined time, )say 5pm thru 11.00pm. However, that appears crude for obvious reasons. The (an) alternative seems to me to be to have some form of active activation i.e. PIR- but that raises the problems of animals, trees etc.
Another idea is to utilise the control commands on the gates (if this is possible?) At this point in time I haven't purchased gate activation/motors but have simply wired my Airphone door control/CCTV system out to the gates themselves in preparation.
Would it be possible to activate lights in the same process as opening the gates? However an override would be required when the gates are left open?
Am I asking for too much?
Any further ideas/suggestions.
Jaba