Westinghouse incandescent general service light bulbs are perfect for use in appliances, microwaves and ceiling fans. Incandescent A-shape light bulbs also come in a variety of sizes and wattages that are perfect for many general lighting purposes. To find the right bulb for the right application, see Westinghouses full offering of standard A-shape light bulbs including Long Life, Non-Stick and Commercial Service varieties. A-shape light bulbs are available with medium, intermediate and candelabra screw bases making them compatible for use with standard household fixtures -- everything from table lamps, ceiling fans and appliances to porch lamps and outdoor lanterns.