system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 Why do modern lightbulbs seem to only last for eight or so years but the first lightbulb ever made still runs today?
gpt
It's not the first bulb ever made that still runs today.  Early light bulbs used to last only a few hours before burning out.  A specific light bulb, with low energy consumption and a thick carbon-based filament (that they're not quite sure what it's made of...) still runs after over a hundred years of continuous use, but we don't want dim light for a long time, we want BRIGHT light to illuminate our hovels, and that wears out components much more quickly.