The Zoo Med Nano Basking Spot Lamp will provide a slightly smaller and more concentrated basking area than the larger bulbs. This makes it an excellent choice for diurnal reptiles that bask during the day, especially in smaller enclosures when a heat gradient should be provided allowing your reptile to thermo-regulate as needed. Fits standard ceramic light fixtures and the Zoo Med Nano Dome fixtures. Zoo Med lighting is great for smaller desert and tropical reptile, amphibian or invertebrate species! This heat lamp does not emit UVB.