Zilla Night Black Heat Incandescent Spot Bulb emits a focused, 24-hour heat source ideal for reptile basking areas, Great for night-time viewing to observe natural nocturnal behaviors, Ideal for tropical and desert habitats; the bulb provides focused heat while the photons emitted by the filament never escape the dark tint, The spot bulb provides a focused beam of energy to heat the air inside the enclosure to create the warmth needed for a healthy reptile environment, The night bulb is coated with rare earth black phosphors, which simulates the moons natural glow for nocturnal viewing without disturbing the reptiles day/night cycle, Emits Focused, 24-Hour Heat Source Ideal for Reptile Basking Areas, Great for Night-Time Viewing to Observe Natural Nocturnal Behaviors, SKU: RPS22769