Zilla Incandescent Bulb, Night Red Heat, 50 Watt (3 Pack) Pack of Three Zilla Incandescent Bulbs, Night Red Heat, 50 Watt Heavy duty filaments yield hours of performance Provides consistent ambient heat that warms the habitat Allows for viewing nocturnal habits and shy species' activities Visible red glow does not disrupt creature's nocturnal habits or sleep patterns