Svnry Reptile UVB Light/Lamp Test Card, 2 in 1 UV & Temperature Test Card, Design for Reptile

❤Function❤UVB Meter/UVB tester reptile card measures the intensity of the UVB & UVA rays of UV fluorescent light. The back can be used for temperature testing, ranging from 64 to 108 ° F /18 to 42 ° C ❤Feature❤Card changes colors from White to Purple based on the UVB & UVA ray strength. When the temperature is tested, the corresponding temperature value will change color ❤Easy to use❤Cover the test card with your thumb, when the shows color difference between the thumb-covered and non-covered areas on the testing card, means that the UVB bulb is working normally. When testing the temperature, put it directly in and wait 10 seconds to get the temperature value ❤Easy to save❤2PCS Durable plastic card measuring 3.4in x 2.1in. ❤Can be recycled❤Can be used over and over again up to 500 times.