How Christmas Lights Are Made

Ever had to throw away an entire string of Christmas lights just because one or two bulbs weren’t working? You’re not alone. Some Christmas lights just won’t work with a single burnt-out bulb, while others will just keep on glowing all winter long! What makes some lights different from other lights? Turns out, it’s all in the manufacturing — and how the lights are wired at the factory. Here’s how those massive strings of glowing festival decor are made.