I looked at a house today that I am going to be lighting soon. The homeowner has about 50-60 soffit mounted recessed 120 volt can lights being used to downlight the architecture of his house. He likes the effect but is not so keen on his electric bill every month as a result of these lights. He asked about converting these cans to a 12 volt system. I have seen the 12 volt cans before, but I don't know if there is another way to do this or if it can even be done. He doesn't want to really do any additional uplighting on the house, but would rather utilize the cans if he can. His builder told him no because of nearby insulation, but I can't imagine the line voltage lights are much cooler. Any body have any thought or solutions I might entertain? Thanks for the help in advance.