Aiicioo UVB Fluorescent Bulb - 10.0 Desert Terrarium Lamp Long-Lasting High UVB Output for Optimal Calcium Metabolism T8 15 Watt 18in HIGH UVB OUTPUT - AIICIOO reptile uvb bulb has a very high UVB output similar to sunlight in deserts. These locations receive more direct sunlight BEING HEALTHY - The high Vitamin D3 yield index ensures vitamin D3 photosynthesis to aid calcium absorption and prevent metabolic diseases and other health problems IDEAL FOR DESERT REPTILES - Desert dwelling reptiles are more exposed to UV radiation than any other type of reptiles, such as panther chameleons, Russian tortoise, bearded dragon and lizard RECOMMENDED FR SCREEN COVER TERRARIUM - This bulb can be used on terrariums with denser screen covers to ensure sufficient UVB penetration DIMENSION: 18inch, Watt: 15w Check the UVB rating for your animal Check the average basking distance between your animal and the bulb Compare the animal rating and bulb positioning height