I did consider Solar but experience to date has not been that good really. I really want path/patio edges illuminated or at least demarcated for the Mrs. There should be no reason why a low power system should not be reliable its just a case of finding it.
Toolstation do some simple Luceco systems but x compatibily is unknown as is expandability/provision of more sophisticated switching gear. Luceco is a mainstream brand. I may try one of these in the short term.