1.- The oldest light bulb that still works has 110 years and is known as Centennial Light. The 4 watt light bulb is at a fire station in Livermore, CA. and has never been switched off.
2.- The incandescent light bulb makes light by heating a metal filament wire to a high temperature until it glows.
3.- The electricity finds it hard passing through the thin filament and the friction caused makes heat and light energy.
4.- Light bulbs are produced in a wide range of sizes, light output, and voltage ratings, from 1.5 volts to about 300 volts.
5.- The incandescent light bulbs work equally well on either alternating current or direct current.
6.- Incandescent lamps are gradually being replaced in many applications by other types of electric lights, such as fluorescent lamps and light-emitting diodes (LEDs).
7.- The energy saving from recycling 1 plastic bottle can power a 100 watt light bulb for almost 60 minutes.
8.- The first light bulb was built by Humphry Davy in 1809. Thomas Alva Edison improved the invention and based his improvements on a patent he purchased from inventors Matthew Evans and Henry Woodward.
