Zoo Med Day & Night Reptile Bulb Combo Pack gives you what you need for 24 hour temperature control to keep your pet reptile warm and comfortable. Combo pack includes one Daylight Blue bulb perfect for heating reptile or amphibian terrariums while providing bright, naturalistic light for viewing, and one true red glass heat lamp to provide a 24 hour heat source for all reptiles - especially excellent for viewing nocturnal reptiles.