Let’s say you and a few friends are lightbulbs. There are two parallel bars that connect to rungs (the part you swing from). You might think of this type of circuit like the monkey bars on a playground. This newer set has individual loops, or circuits, for each light. I decided to pick up a new set of lights. I attempted this with my broken lights, but didn’t have much luck. Usually this happens when the tiny wire bridge that connects those two vertical wires inside the bulb melts or breaks.Ĭrandall said in some sets of lights you can gently shake the bulb to try and get the tiny horizontal wire to reattach to the vertical ones. My string of lights is on one long path, or circuit- if one of the lightbulbs goes out, they all go out. The current moves on, powering up the other lights, until it gets back to the power source.
The current follows another tiny vertical wire down and out the bulb. Here, it crosses a tinier horizontal wire, which acts kind of like a bridge, for the electrical current. When the electricity reaches the first bulb in a string of lights, it flows up a tiny vertical wire inside the bulb. We can get this current of electricity to follow different paths, depending on how we wire up the lights. A lightbulb works when an electrical current runs through thin metal wires in the bulb and electrical energy gets converted to heat and light. I visited my friend Aaron Crandall, an engineer at Washington State University, to see if I might get them working again.Ĭrandall explained when you plug in a string of lights to a power source, like an outlet, an electrical charge flows into the wires. Just the other day I was taking down a string of lights from my lab, when I discovered the bulbs were burnt out.
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