The Daylight Blue Reptile Bulb is for Use In Horizontal Facing Light Hoods. It Provides Uva to Promote Psychological Well-Being and Stimulate Normal Feeding Behaviors. It Can Be Used with Reptisun 5.0 Fluorescent Lamp. It has True Blue Glass (Not Painted Or Coated) For Better heat Transfer. It is a Full Spectrum Daylight Bulb For Heating Reptile Or Amphibian Terrariums. Product is made with European Quality For Long Burn Life.