Zoo Meds ReptiSun 2.0 has a high C.R.I. (Color Rendering Index) of 98! Brings out the color in your animals for optimum viewing. The ReptiSun 2.0 is the perfect lamp for all types of snakes or amphibians and nocturnal reptiles that do not have high UVB requirements. Emits UVA, which helps to increase appetite, physical activity, and reproductive behaviors, and is important to the psychological well-being of your animals. AllReptiSun 2.0s are T-8 energy saving bulbs.