Watch The Great Christmas Light Fight online: Episode Episode 4

Four families compete for $50,000 and the coveted Light Fight trophy, including the Shaw family, whose display features more lights on its Christmas tree than the famed tree at Rockefeller Center; the Kasper-Cook family, who built their home to showcase a light show; the De Sario family, whose passion has helped them raise almost $150,000; and the Thompson family's all-handmade holiday display.

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