How does a lightbulb just burn out?

Answer #1

the filiment gets to metal fateg and breaks…yes i know my spelling sucks

Answer #2

if your talking about the incandescent… they use tungsten (middle part the goes horizontal) and use energy to burn it… tungsten is used because it can burn for a long time but yet still not break…. when the tungsten gets burned for a long time than it breaks…. tungsten uses the power source as energy to burn thats why it makes ur electric bill go up.. i dont really know how the other types of light sources burn out

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