It's hard to believe that residential and commercial electric power has only been around for the last 120 years. Many of our grandparents were alive when the notion of electric powered lights was novel. The advent of widespread electric power was not without controversy. An epic technical battle was waged between two giants of the era, Thomas Edison and George Westinghouse. Edison was a proponent of DC electricity while Westinghouse favored an alternating current approach. Discuss the technological arguments that were brought forward by Edison and Westinghouse. Bring physical detail to your posts.