The filament is a very thin wire in the form of coil or a straight wire, which is used to convert the electrical energy to light energy. This is the first electrical source of light energy. The tungsten filament is used in an incandescent lamp or in the bulb. Tungsten filament and its temperature have a connection when it is in the working condition.
The bulbs are the most common source of the light energy, which is operated on electrical energy. The bulb is based on incandescence, as electrical energy is passed through the thin tungsten filament; it heats up at a very high temperature so that the bulb emits light. In free space of the bulb either there is vacuum or any inert gas, filled so that it prevent the tungsten filament from the oxidation of the red-hot tungsten filament. They are also called the arc lamps or the electrical lamps.
The tungsten filament temperature on heating goes to 3300 k. At this temperature, it begins to glow and we get the light energy. If the bulb is filled with Argon gas, then it prevents the oxidation of tungsten filament up to 3300 k temperature. We use the tungsten metal to make the filaments because it has very high melting point at about 3700 k. The bulbs are operated on a wide range of the voltages. They work from 1.5 Volts to 300 Volts. They have very low manufacturing cost, works on the direct, and alternating current.
Tungsten filament is used in the table lamps, car headlights, flashlights and for the decorative purposes. They are also used in the poultry farms, reptile tanks, and aquariums, to maintain the temperature. Nowadays, the bulbs are replaced by LED lights. They consume very less electrical power so the electricity cost is very less. However, the tungsten filament is still unchanged.