As the symbol of initiation, the incandescent light bulb is just not very progressive. It hasn't changed much since Thomas Edison introduced it . Even now, it still generates light by heating a tungsten filament until it reaches 4,172 degrees Fahrenheit (2,300 degrees Celsius) and glows white-hot. Sadly, all of that light that is white is not very green. A great deal electricity from coal-fired powered plants accountable for spewing greenhouse gases into the atmosphere -- is required to make an incandescent bulb burn brightly. Just 10 percent goes toward making light.
Luckily for our CO2 -soaked planet, a brand new type that stands poised to replace Edison's most famous creation as ideation's icon. Instead of a glowing filament, CFLs contain mercury vapor and argon housed within a spiral-shaped tube. They likewise have an integrated ballast, which produces an electric current to pass through the vaporous mixture, exciting the gas molecules. In CFLs that were older, it took several seconds to generate enough electricity to ramp up the excitation. Newer CFLs demand a shorter warm up and have ballasts that are efficient. In either case, when the gas gets excited, it creates ultraviolet light. The ultraviolet light, in turn, arouses a fluorescent coating painted on the interior of the tube. This coating emits visible light, as it absorbs energy.
Believe it or not, CFLs are the descendants -shaped fluorescent bulbs that still flicker in garages and workshops all over the world. However, these aren't your father's fluorescents. Despite their heritage and their likenesses to incandescent bulbs -- they both demand electricity, they've a glass cover, they've a threaded foundation -- CFLs are emerging as the largest thing in interior illumination since the candle.