Different types of light bulbs are available in market such as Incandescent bulbs, Compact Fluorescent (CFL) bulbs, Fluorescent bulbs and Halogen bulbs. Let us have a brief idea of their features and working.
Incandescent bulbs are regular or standard bulbs which are still most common. They are available in a wide range of colors, shapes and sizes. These bulbs are suitable for most uses and fixtures. However, they have low initial cost but they have higher associated energy costs over their lifetime. These bulbs create light by heating a filament inside the bulb. Since much of the energy used to heat the filament is wasted, they are less energy-efficient.
Compact fluorescent bulbs are very popular among general public as they save huge amount of electricity (consumes near around two third of electricity consumed by a standard bulb). These bulbs are very durable and are available in various shapes, styles and light output. They can also be fixed in any kind of socket.
Now we will discuss that how a compact fluorescent bulb works. Inside these bulbs, a mercury gas filled tube or ballast is present. With the flow of little current from ballast to this gas, UV light is generated and when this light hits the white coating of the bulb the bulb glows to provide you light. In this process, very little heat or say electricity is required, which makes them energy efficient.
Standard fluorescent bulbs are very similar to compact fluorescent bulbs. Fluorescent bulbs also help in saving electricity and are very durable but these bulbs can not be fixed in standard sockets. One more disadvantage of using fluorescent bulbs is that you can not get many choices in it. These bulbs are available in linear, circular and U-shape.
The method through which light is produced by a fluorescent bulb is similar to the method used by compact fluorescent bulbs. One point where they differ is that in fluorescent bulbs you require separate ballast.
Halogen bulbs could be found in market in different shapes and sizes such as A-line and reflector style. The light generated by them is also clear and bright. These lights have high initial cost but are long lasting.
Halogen bulbs provide light using the same technique as incandescent bulbs. However, in a halogen bulb, the halogen gas inside the bulb deposits the tungsten back onto the filament as it evaporates, allowing the bulb to last longer.
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