REPTI ZOO UVB Tester Reptile Lamp UV Sensor Reptile UVA UVB Fluorescent Lamp Tester Card, Set of 2

Features: 1. UVB tester reptile card measures the intensity of the UVB & UVA rays of UV fluorescent lamp. 2. Card changes colors from White to Purple based on the UVB & UVA ray strength. 3. 2PCS Durable plastic card, credit card size, 3.4 inch x 2.1 inch comes in a sleeve. 4. New High Tech, Non-Toxic, environmentally friendly detection matrial that is printed on the card to measure the UVB/UVA rays of UVB lamps. 5. Can be used over and over again up to 500 times. Great handout. Special Feature Easy to Use Light Type Fluorescent Brand REPTI ZOO Style Reptile UVA UVB Fluorescent Lamp Tester Card, Set of 2 Item Dimensions LxWxH 3.4 x 2.1 x 0.01 inches REPTI ZOO UV Tester Card, Pack of 2 Great to use for UV fluorescent lamp and mercury vapor bulb. Quick and easy to use. Not a precision instrument, but can give you advice when to replace the bulb. Card changes colors from White to Purple based on the UVB & UVA ray strength. Can be used over and over again up to 500 times. Great handout.     2PCS Durable plastic card, credit card size, 3.4 inch x 2.1 inch comes in a sleeve. It can be used for any uv bulbs. This reusable card can measure ultraviolet (UVB/UVA) radiation accurately in 10 seconds. Hold the card under the UVB lamp at the basking site (within 5cm/2in distance to the lamp) to check if the UVB /UVA is available or not. Do not place the card in the sunlight. Please place the card back to the card sleeve when not in use.