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There are three main types of light bulbs - incandescent, fluorescent, and halogen. All of these bulbs come in differents sizes and shapes, and produce different levels of light. But there are some significant differences between each type.
Incandescent bulbs are the regular, "screw-in" bulbs that most lamps require.
They're also available in different colors and energy saving models.
Fluorescent bulbs generally produce more light per watt and have a longer lamp life than incandescents, and they are especially good when lighting entire rooms.
One new development in fluorescents are compact models that can be used in desk lamps or wall sconces.
Halogen bulbs provide an instant-on white light, generate up to 30% more light and last longer than incandescents.
But they also cost more than incandescents
