6pcs Light Test Cards Portable UVA UVC Test Cards Suitable for UV Test Area and UVC Test Area UVA and UVC test cards are designed with a UVC test area and UV test area, Easy to use, when it is irradiated by UVA lighting, there is no display in the green area. When it is irradiated by UVC lighting, green could appear in a green area with "UVC" letters. Features -Color:As Shown -Material:Paper -Size:7.00X2.50X0.10cm/2.75X0.98X0.04in - This card is made of unique paper materials, only sensitive to ultraviolet rays, and other visible light is invalid. - Accurate measurement, card is perfect display of UVC-UVA effect, bring you good using feeling. - Enough quantity. UVC-UVA cards are enough for you to use, you can prepare them as a backup. - Place the UV sensitive area of the card in the sun, the stronger the UV in the sunlight, the darker the color. - UV light test card, technology to provide UV readings in few seconds, great for meet your needs. Package list: 6 x test cards