Light slim LED light therapy does not share the same wavelengths of light with UV rays that the sun has that are known to fade tattoo color. The LED light session is approximately 15 minutes and is implemented to help speed up healing and recovery. It is completely safe over the eyebrows after Microblading and DOES not fade the color. The UV rays from the sun are extremely harsh and different and over time will fade the tattoo. Light slim LED therapy is 100% approved over Microblading.