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 consistent ambient heat that warms the habitat Visible red glow does not disrupt creature's nocturnal habits or sleep patterns 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, 100 Watt