To both Redsy and Johngeorge,
What is WAC lighting?
I can't believe the transformer would be left inaccessible in the walls. This house is only around 10 yrs. old. It's a very large home costing probably 500K to 1M new and the electrical materials are what you would find in tract homes complete with back-wired spec-grade receptacles. I'm changing every one that I get near. Lots of dead outlets due to it's upstream neighbor with loose connections.
>>I have also seen the lighting you have indicated in the 120 volt varity - if it is, your customer may have a problem, and also a hazard.
It's 12 volt, why would it be a hazard if it were 120 volt?