Uvc light test card, technology to provide reliable uvc readings in few seconds with instant notification of optimal uvc germicidal wavelengths. Monitoring uvc along with verifying that the optimal uvc germicidal light wavelengths are being used in your disinfection process. Features - Color: Assorted color.- Material: PVC.- Size: 7.00 x 2.50 x 0.10cm/ 2.75 x 0.98 x 0.04 inch.- Professional test cards designed for high power UVC devices offering a higher cards to analyte contrast on highly UV.- Resilient PVC material for high power exposure without aging/discoloration- UVC test cards for unprecedented quality control for UV analyte production and calibration.- Take 1 strip under the light, when the colour of the cards changes from white to dark purple / light green, your device is effective.- Test strips effective test for light stick. Unlimited usage time, 10 pieces per set.Package list: 10 x uv test cards