Candles were used to decorate Christmas tress before the electric lights became available.
Benjamin Harrison had the first Christmas tree with electric lighting and may have had the first indoor Xmas tree. He was the president when electric lights were put in , in 1891,
unknown
president Benjimen Harrison
No, Clapham was not the first village to get electric street lights. It was however the first village outside London to have electric street lighting.
Electric head lights has been used since 1917.
In 1895, U.S. President Grover Cleveland proudly sponsored the first electrically lit Christmas tree in the White House. It was a huge specimen, featuring more than a hundred multicolored lights.
1913
Polk was president when gas lights were installed in the White House.
Berlin first got electric street lights in 1882 when Siemens was awarded a contract to do so.
Chicago
In 1882 Edward Johnson from New York City lit up a Christmas tree with electric Christmas lights for the first time.