Reptiles, are cold-blooded, or ectothermic. Unlike endothermic, or warm-blooded animals, reptiles cant produce their own body heat. Fischuel heat lamps produce both UVA/UVB light which is needed by your reptile to maintain their bodily functions and generate Vitamin D3 in their bodies. This essential vitamin aids the conversion of calcium in your reptiles diet into strong bone mass, helping them to grow and develop a strong skeleton structure (or shell too, in the case of tortoises and turtles) and to help their joints move better. More precise areas We found our turtles and geckos openly basking under the UVB, a lot. They honestly wouldnt do it, if it didnt benefit. They know the goodness it provides. Let the turtles and geckos or any reptile choose its own exposure. They are quite capable of deciding if they want to use the UVB or not. Fischuel heating lamps provide more precise UVB areas, and help them find their favorite spot! More Features - UV Bulbs Comes with two E27 50W bulbs, which have UVA/B that simulate sunlight. - Multifunctional It is capable of producing both heat and light. UV rays and simulated sunlight are delivered to pets. - Superior Quality Made of high-quality glass with a long-lasting wick that extends the UV spectrum. - Suitable for all kinds of terrarium. Notice - It can be used 24 hours a day, but we suggest using 2 hours or more by turns which will prolong its life. - The temperature of the lamp is high while working, please wait for 3-5 mins after turning it off and then touch it. - The UV Bulb is waterproof, but cannot be immersed in water for a long time. It is only suitable for air environment heating, not water heating. - Its better to stay 20-30cm away from the turtles back - - UV BulbProvides two E27 50W bulbs,which has UVA/B that simulate sunlight. - - MultifunctionalIt is capable of producing both heat and light. UV rays and light are delivered to pets. - - Superior QualityMade of high-quality glass with a long-lasting wick that extends the UV spectrum. - - Use RangeSuitable for most reptiles, birds, amphibians and succulent plant. - - NoticeIt can be used 24 hours a day, but we recommend turning it on for 2 hours or more at a time to extend its life.