The Exo Terra Solar Glo Sun provides the benefits of natural sunlight the proper balance of ultraviolet light (including UVA and UVB) visual light and infrared light (heat) in one easy-to-install bulb. The Solar Glo is a full spectrum light with carefully tuned peaks to ensure appetite activity brilliant colours and calcium absorption through Vitamin D3 production and above all to prevent metabolic bone disease.Optimal levels of UVB UVA visual light and heat in one bulb. - Self-ballasted mercury vapour bulb. - Provides the benefits of natural sunlight. - Helps prevent metabolic bone disease. - Increased UVB penetration distance (+30 cm). Also available in 125w See model RT184