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. This lamp has a high quality heat element for longer burn life and is ideal for heating large wire or glass terrariums, it increases the overall ambient (inside) air temperature of your terrarium.