Philips 275784 150-watt A21 Frosted Rough Service Light Bulb Philips A21frosted rough service household light bulbs are the perfect shape for open hanging pendants, table/floor lamps and ceiling mounted fixtures Extremely suitable for places where shocks, bumps and vibrations frequently occur Provides a soft, white light to create a relaxing and comfortable environment Rough Service bulbs resist breakage or shattering A21 shape, Medium Base