I have an extensive HO layout and I am considering adding lighting to several buildings and structures on the layout. I am looking for advice on what type of lights I should use. I am interest to know how people do their electric portion of their layout. I am thinking about using LED strip lighting but I have a couple of smaller layouts adjacent to the main layout that may require a seperate battery operated power source. In regards to a seperate power source, has anyone used a battery powered source?