This time of year Home Depot has the xmas stuff out and included are "floodlight holders" you can get them as singles or three strung together. They come with something like a 6' cord and plug. Walmart has had them in the past but am not sure if they still have them I just bought some yesterday at HD so I know they have them. Here is a picture of what I am talking about. They also are made to go outside and are water resistent making them safer.