Untangling the History of Christmas Lights

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Across
  1. 1. Type of lights Johnson used instead of candles
  2. 3. Decorated with lights for the festive season
  3. 5. Edison's invention that Johnson took on tour
  4. 8. Fire risk associated with candle-lit trees
  5. 11. Inventor of the first electric Christmas tree lights
  6. 12. Edison's invention that Johnson used for Christmas lights
Down
  1. 2. Holiday associated with decorated trees
  2. 4. Johnson's lights became a holiday custom
  3. 6. Inventor of the light bulb and phonograph
  4. 7. Revolving base for Johnson's tree
  5. 9. Powered Johnson's first electric Christmas tree
  6. 10. President who put electric lights on the White House tree