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Reflector bulbs are most commonly used in spotlights. The interior is usually painted silver to reflect the light. With a wide beam angle they are suited for directional lighting such as track lighting, recessed ceiling lights and desk lamps. The bulb is shaped in such a manner that the required light distribution is achieved by reflection from the coating. In order to eliminate highlights, which are particularly noticeable in illumination at short distances, part of the bulb through which the lamp’s light flux passes is given a frosted finish.