REPTI ZOO UV Sensor Reptiles UVA And UVB Fluorescent Lamp Tester Card Set Of 2 Reusable Photochromic Testing Cards For Pet Habitat Lighting

Ensure your exotic pets receive the optimal amount of ultraviolet radiation with the REPTI ZOO UVB Tester Reptile Lamp UV Sensor Cards. Designed for reptile keepers who prioritize habitat health, this set of two reusable testing cards provides a quick and reliable way to verify if your UVA and UVB fluorescent or mercury vapor lamps are still emitting safe levels of light. Since reptile bulbs naturally lose their UV output long before they actually burn out, these visual sensors act as a critical early warning system to help prevent metabolic bone disease. Each credit-card-sized tester features advanced, non-toxic, and environmentally friendly photochromic detection material that reacts instantly to UV radiation. When placed within five centimeters of your lamp at the basking site, the indicator area shifts from white to purple within ten seconds, indicating the current strength of the ultraviolet rays. Built for long-term utility, these durable plastic cards can be reused up to five hundred times when used in ten-second increments. This essential monitoring tool ensures you replace failing bulbs precisely when needed, maintaining a perfect environment for chameleons, bearded dragons, and other reptiles without relying on guesswork.