🦎 ENSURES PROPER UVB LEVELS — Reptiles and amphibians need UVB light for their health. The Rapid Sense Decor Poplar Log allows you to check the UVB levels ensuring your pet has what they need to stay healthy and thrive. 🦎 ELIMINATES GUESSWORK — It lets you know it may be time to change the bulb. When you expose the Rapid Sense indicator to a UVB bulb, the indicator changes color to show the current UVB output of the bulb. 🦎 INTERACTIVE DECOR FOR YOUR PET — Gives your pet reptile a place to hide or bask. 🦎 ADDS A POP OF COLOR — The design includes accents that fluoresce under a black light (often used at night) to add a pop of color and visual interest to the terrarium. 🦎 BLENDS INTO TERRARIUM DECOR — The Rapid Sense Decor Poplar Log matches the style of the terrarium, blending into your reptile's habitat. 🦎 HOW TO USE - Hold the indicator under a UVB bulb for about 30 seconds. Then compare the color you see on the indicator to the color shown on the chart in the decor's instructions. If the indicator is below your pet's healthy range, it's time to replace the bulb. Important information Directions The Rapid Sense Decor indicator is in a different location depending on whether you have the medium- or large-size Crocodile Skull. The indicator is located underneath a reusable feeding cup on the large size. The medium size has the indicator on the underside of the decor. To check the UVB levels, hold the indicator under a UVB bulb for 30 seconds. Then compare the color you see on the indicator to the color shown on the chart in the decor's instructions. If the indicator is below your pet's healthy range, it's time to replace the bulb. Do not leave Rapid Sense™ indicator exposed to UV for longer than 30 seconds to check. Do not clean Rapid Sense™ indicator with any cleaning products other than soap and water. Product Dimensions ‏ : ‎ 7.5 x 5.19 x 3.38 inches; 4.66 Ounces Manufacturer recommended age ‏ : ‎ 1 month and up Item model number ‏ : ‎ 100549771 Manufacturer ‏ : ‎ Central Garden & Pet