UV-CLight can inactivate pathogens including bacteria and viruses on surfaces. The performance of this device depends on the characteristics of the surface, the exposure time, and the distance from the surface. For best results, slowly wave wand 1-2 inches from the surface for 30 seconds for each 1.25 in. x 8.5 in. area. Feit Electric makes no express or implied claims as to the effectiveness of this device.