Incandescent A23 and PS30 shape light bulbs are perfect for general lighting purposes that require high light output. These light bulbs come in clear or frost finishes. To help you find the right bulb for the right application, see Westinghouses offering of A23 and PS30 shape light bulbs. Available with medium screw bases, these light bulbs are compatible for use with standard household fixtures - everything from floor lamps, work lights and garages to outdoor light fixtures.