Satco 75 Watt A19 Blacklight Light Bulb is an efficient lightbulb for both residential and commercial use in any standard incandescent fixture that accepts medium base bulbs. This bulb creates spectacular effects, making it i for parties, room decorating, and dorm rooms. Whether you want to set a relaxing ambiance or highlight a specific area, this blacklight delivers the desired atmosphere with ease. Model Number: S3920