Step up to the convenience and cost savings of halogen For healthy light and essential warmth, few reptile bulbs offer better long term cost effectiveness than R-Zilla Halogen. The high-intensity output of a halogen bulb is more energy efficient than standard incandescent bulbs, lowering electric bills. As an added bonus, a halogen bulb's smaller size allows easier use in tight terrarium spaces. Spotlight output directs light and heat for maximum visual drama and reptile comfort. Choose from a full selection to meet specific pet care needs.