Our set of light testing cards is an essential tool for anyone using . To use, hold a card in of the light. The card will change color, indicating the presence and intensity of UVA and . This allows you to verify that your light is functioning properly and providing effective cleaning. Features -Color:Multi -Material:PVC -Size:7.00X2.50X0.10cm/2.75X0.98X0.04in -Robust pvc construction: crafted from robust pvc material, these identifiers are designed to be and , ensuring longterm use and consistent performance - capability: these identifying cards can test both uva and wavelengths, providing versatile testing options for different light sources -Simple and convenient: with a straightforward plugandplay design, these test cards are easy to use, requiring no additional setup or technical expertise -Clear and accurate display: the small uvc-uvc test strips offer clear and accurate displays of light wavelengths, ensuring assessment of light in various applications -Ideal for professional environments: ideal for use in a variety of professional light testing scenarios, these testing cards are suitable for laboratories, industrial settings, and more Package list: 20 x testing cards