'Downton Abbey' Finale: What The PBS Hit Did Wrong (And Right) In Season 2

...well, Wikiknowit­all says that the first tree with electric lights was "hand-wire­d with 80 red, white and blue electric incandesce­nt light bulbs the size of walnuts, on December 22, 1882..." and also that "electric Christmas lights did not become the majority replacemen­t for candles until 1930."
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