Incandescent filaments to run hotter and thin faster
LED drivers to overheat or fail prematurely
Even a small increase—say from 120V to 128V—can reduce bulb life by 50% or more.
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Why Overvoltage Often Shows Up Suddenly
Voltage problems often appear all at once because something changes:
A utility transformer is adjusted or replaced
A neutral connection degrades
Seasonal power demand shifts (more on this later)
When that happens, bulbs across the house can start failing in clusters.
2. Loose or Faulty Neutrals: A Serious (But Often Invisible) Problem
One of the most dangerous causes of repeated bulb burnout is a loose neutral connection.
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What Is a Neutral Wire?
