Zilla® Incandescent Bulbs feature heavy-duty filaments that yield more hours of service from every bulb than the average filaments. Choose from a full selection to meet specific pet care needs. Provides ambient heat that creates a healthy environment for reptiles Does not emit visual light which can be disruptive to the creature or room Gentle glow produces little visual light allows for viewing nocturnal habits and shy species activities Heavy-duty filaments yield hours of performance Recommended for use with Zilla® Reflector Domes Available Sizes: 50 Watt / 75 Watt