The Repti Basking Spot® Lamps have a unique patented double reflector that focuses 35% more heat and light into a tight beam. Ideal for use with diurnal reptiles that thermo-regulate by basking, including many tropical and desert species. Provides beneficial UVA rays important for the psychological well being of all reptiles. Increases the overall ambient (inside) air temperature of your terrarium. Especially helpful for all tropical and desert species i.e. Iguanas, Bearded Dragons, etc. Unique double reflector design focuses 35% more heat and light than regular spot lamps. Tighter beam creates a more effective basking site than ordinary reflector bulbs.