The best Christmas ... no overpriced hot cocoa involved. The special feature that sets Twinkly apart is a scan you perform using your phone’s camera that maps out every light on your tree.

Johnson, Edison’s friend and partner in Edison’s Illumination Company, strung together the first string of electric Christmas tree lights. Johnson hand-wired 80 red, white and blue light bulbs ...

As Christmas approaches ... the beauty of electric light: 80 twinkling red, white, and blue bulbs strung between the boughs of a large Christmas tree, which he mounted on a rotating platform ...