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Without light bulbs, you couldn"t wake up and flip a switch to lighten up the place, you'd have to take the inconvineice of lighting up a candel, lamp. or torch. Lightbulbs have made modern life easier and less tedious.  People also use lights for events like the theaters, plays, videos, and special effects. One example of this is the Blue Man group. We also use lights for safety, like blinkers or head lights on cars

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Inventor- Thomas Edison (1847-1931)
Made- Menlo park, New jersy, 1879
How it works- The light bulb is a glass container, inside a tungsten filament and a gas that is non-reactive, and when turned on, electricity heats it up.
Average cost then-$23
Average cost now-$5
Purpose- Make it easier to see without the use of multiple candles and torches. Without it, it would be harder to light up rooms