The Exo Terra Repti Glo 5.0 Bulb creates the ideal UVA and UVB level output. With 30% UVA and 5% UVB, this combination mimics the natural light of the sun and, therefore, creates the ideal environment for your turtles. This product is the best way to create a habitat that mimics thick vegetation and high humidity for your turtle to bask in. MyTurtleStore.com has everything you need to provide your turtle or tortoise with a perfect environment!