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John Graham-Cumming, of Geek Atlas fame, has posted a piece to answer the perennial question “Why do Christmas lights all go out when one bulb blows?” (the old-school in-series non-LED variety). And he shows ye ol’ “binary chop” technique for quickly rooting out the dead bulb.

Why do Christmas lights all go out when one bulb blows? (and how to find the broken one)

Gareth Branwyn

Gareth Branwyn

Gareth Branwyn is a freelancer writer and the former Editorial Director of Maker Media. He is the author or editor of over a dozen books on technology, DIY, and geek culture. He is currently a contributor for Boing Boing and WINK Books. And he has a new best-of writing collection and “lazy man’s memoir,” called Borg Like Me.


  • http://www.tackylighttour.com Matt

    What a great question, answer and technique! I bet all the crazy decorator peeps at http://www.tackylighttour.com would save some time with this.