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Colored light bulbs use the same process to turn electricity into light as incandescent bulbs. Electricity is passed through a filament of tungsten wire, which is heated and reacts with the inert gas mixture that surrounds it. A colored light bulb is usually made the same way as a standard bulb, but the glass is then coated with a translucent paint or film. Colored bulbs are often used to create a certain mood or atmosphere. Many stores and restaurants rely on them to add ambience, but they can be used at home as well. These bulbs are also popular in signs and marquees, where they draw attention and catch the eye. 1000Bulbs.com stocks colored light bulbs in a variety sizes, shapes and, of course, colors.