How did this use of electric Christmas lights begin and how did the sale of
these little twinkling reminders of the holiday season become a commercial
success? Read a brief history of this much safer alternative to
the use of candles to illuminate indoor Christmas trees. You’ll find pictures
of early Christmas light sets, the first National Christmas Tree, and a
photograph of the Capitol Christmas Tree in 2000, with a link to information
about earlier Capitol Christmas Trees and the tradition of having a tree at the
Capitol in addition to the more famous tree near the White House. - Tech and Learning