UNIVERSAL RETROFIT (2-IN-1): Ushio Indiglow LED T8 Black Light Universal 48 tube works as ballast-compatible (approved electronic T8) or ballast-bypass/direct wire. One lamp covers more installs. 405NM NO UVA BLACK LIGHT EFFECT: 405nm LED chips deliver punchy glow effects for fluorescing paint, makeup, carpets & décor while remaining outside the UV zone for a safer employee environment.