Sunlite A19/LED/2W/BLB LED UV 2W A19 Blacklight Blue Bulb with E26 Medium Base 2 watt, 120 volt perfect step up replacement from an 60W incandescent and 13W Compact Fluorescent Bulb (CFL Spiral) lamp True 365 nm Blacklight LED is perfect for identification and monetary validation Great for special effects, parties, art, painting, Halloween, and similar applications Black lights colored lighting is also used in night clubs, bars, party, and other entertainment venues The 365 nm color wavelength is designed to solely light up UV Ultraviolet objects without affecting any of the surrounding area