Ultrasun lamps are intended for tropical or desert lizards and turtles. Balanced UVB emission for the growth of solid structures (scales, claws, shells). Prevention of metabolic bone disease. The UVB rays contained in the Ultrasun will help your reptiles synthesize provitamin D3 (optimal calcium absorption through the production of vitamin D3). UVA will provide physiological well-being to the animals by reducing their stress. The Ultrasun can be placed on top of the mesh. Easy installation, as the lamp is self-ballasted: it screws into a standard E27 ceramic socket (no separate ballast needed).