Incandescent general service light bulbs are perfect for general or specified lighting purposes and come in a variety of shapes, styles and wattages. to help you find the right bulb for the right application, see Westinghouses full offering of general service light bulbs including nightlights, sign lights, tubular and microwave varieties. General service light bulbs are available with medium, intermediate, candelabra and double contact bayonet screw bases making them compatible for use with standard household fixtures and appliances-everything from curio cabinets, picture lights and microwaves to outdoor signs and scoreboards.