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Projection lamp

Lamps are becoming increasingly important for decoration. A diverse number of lamps, such as projection lamp, ceiling lamp, hanging lamp, table lamp and desktop lamp, have been developed to satisfy user's various needs. A projection lamp generally includes a preformed glass reflector and projection lamp (e.g. tungsten halogen). The reflector generally has an elliptical surface of revolution with the lamp filament at or near the focal point for concentrating a beam of light through the system's various elements. In a projection lamp, a light bulb is located at the focal point of a reflecting cup. The light rays from the light bulb is reflected by the wall of the cup as light rays. Light sources for projection lamps have generally comprised incandescent lamps, the source of light being a coiled tungsten filament heated to incandescence by electric current flow therethrough. In many projection lamp units which include a preformed glass reflector and projection lamp capsule (e.g., tungsten halogen) therein, the lamp capsule is retained in alignment within the reflector by employing a suitable cement within the reflector and about the lamp's sealed end.

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