In the 19th century, the first practical incandescent lamp was invented by Thomas Edison and Joseph Swan. Since then there has been significant improvements in different types of bulbs and their efficiencies. There are different types of lights or lamps around, and they all being designed with a conceived image in mind. Major types of lamps or bulbs are commonly found in the lighting systems of homes,offices, factories, electrical devices etc. The performance of a light fixture depends on the bulb we use. Different types of light bulbs produce different lighting effects.