Thomas Edison

Light Bulb

About The Light Bulb

A light bulb is a device that produces light from electricity. In addition to lighting a dark space, they can be used to show an electronic device is on, to direct traffic, for heat, and many other purposes.

Early people used candles and oil lamps for light (often from whale oil). Crude incandescent lights were made in the early and middle 19th century but had little use. Improved vacuum pumps and better materials made them shine longer and brighter late in the century. Electric generator stations brought electricity to urban and later rural areas to power them. Later gas discharge lights including fluorescent lights use less electricity to make more light.

How It was Created

The first practical incandescent light bulb. Edison and his team of researchers in Edison's laboratory in Menlo Park, N.J., tested more than 3,000 designs for bulbs between 1878 and 1880. In November 1879, Edison filed a patent for an electric lamp with a carbon filament.

Main Uses For The Light Bulb