https://www.mercurynews.com/2019/11/19/holiday-lights-dazzling-bay-area-displays/

Every year, Bay Area homeowners like Frank Rehm — and fellow illumination engineers in the 14 other neighborhoods and popular destinations listed below — go to wonderfully over-the-top lengths to mount dazzling displays of holiday lights around their homes, gardens, parks and other outdoor spaces.

For such displays, we can thank the British royals and an engineer from Thomas Edison’s shop for amplifying a centuries-old German tradition.