It was the height of the Second Industrial Revolution and the White House had just welcomed it's 23rd president, Benjamin Harrison. But back at 1600 Pennsylvania Ave., he faced a much simpler threat that would test his image as a tough leader: electric light switches. When electric lights were installed in the White House in 1891, which included altering the Grant-era gas globe chandeliers, the wires were hidden in plaster, according to the White House Historical Association. Hoover described the Harrison White House as a "homelike administration" as they were a "tight knit family" and had "Hoosier ideas of simplicity." His eagerness to engage with the electrical light switches earned him the nickname "Light Bulb Johnson" among the staff.