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Incandescent Light Bulbs
Home » Lighting & Fans » Specialty Light Bulbs » Incandescent Light BulbsIncandescent bulbs are the “normal light bulbs” that we use for most purposes. They have a thin tungsten filament that is housed inside a glass bulb. The bulb usually contains a vacuum or low-pressure gas, which prevents the filament from burning out from evaporation at a high temperature. Incandescent light bulbs are classified by wattage, such as 60 watt, 95 watt, etc. Here is how incandescent bulbs work: electricity runs through the filament, and the resistance provided by the filament turns the electrical energy into heat. This heat turns the filament white hot, which in turn produces light. In other words, the filament glows, or incandesces, because of the heat.
Incandescent bulbs are known to be less efficient than some other kinds of light bulbs. A lot of electricity is wasted by the large amount of heat they produce. Since the purpose of the light bulb is to make light, and heat is not light, all of the energy that is spent creating heat is wasted.
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