The Vision Infrared Basking Light is an excellent heat source for smaller cages, like the Vision home for birds. While you might find your home’s ambient room temperature comfortable, for many tropical birds, it’s freezing! This can affect your bird’s health and sleeping patterns. The gentle infrared warmth, produced by the special filament of this bulb, penetrates deep into the feathers, skin, muscles, nerves and bones. When used as a heat source, the reddish light will not disrupt pet bird’s sleeping patterns as they do not emit UV light.