Sunlite, 75 watt incandescent medium based A19 black Light bulb works with most 120 volt lighting fixtures, and will last for an average of 1250 hours. This bulb emits a dark purplish ultraviolet color works great as a party light. Incandescent lighting is commonly used for decorative, office, residential, commercial and special purpose lamps. These bulbs are also great for decorative and special purpose lighting applications.