Zilla Night Black Incandescent Bulb 150 Watt (3 Pack) Pack of Three 150 Watt Zilla Night Black Incandescent Bulbs 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 activites Heavy-duty filaments yield hours of performance