An incandescent light bulb is a coiled filament of tungsten. The bulb was fiat introduced in about 1880 and commercialized in the 1920s. Today, you will find a huge range of incandescent lights, with low voltage, low power types to the higher ones. These are also sued as a component in the LEDs.
How it works
The incandescent light bulb, creates light when it heats a metal filament wire to a high temperature so that it glows. The glass enclosure filled with inert gas protects the filament from oxidation in the air. The electric current to the bulb is supplied through wires embedded in the glass or feed-through terminals. Most of these incandescent light bulbs are embedded in socket to offer mechanical support and electrical connections.
Today, you will find these Incandescent lights manufactured in a wide variety. You will come across endless range in sizes, voltage ratings as well as light output. These carry very low manufacturing costs and work well with both the direct current and alternating current. The incandescent lights are widely used in both residential and commercial lighting. You will also find portable incandescent light bulbs in car headlamps, flashlights, table lamps and also in advertising as well as decorative lighting.
However, there are reports of banning on some kinds of filament lamp in some countries, for example Sri Lanka and Australia, who believe that they are not 100% efficient in converting electricity to light.
The initial expenditure of laying out incandescent lights is lower when we compare it to the cost of the energy it uses over its lifetime. An assessment was made, making comparisons of incandescent light with other light sources and check the luminous efficacy of each lamp. The finding of the higher energy usage of incandescent light bulbs in comparison to other energy efficient alternatives, such as CFLs have introduced measures to ban their use.
Some research is being carried out to perk up the efficiency of commercial incandescent lights.