Avian Sun's 26 watt 5.0 UVB bulb is true full spectrum bulb with UVB, UVA and, and visible light.

• Birds need UVB light for Vitamin D3 synthesis, which is essential for calcium metabolism.
• The UVA portion of the spectrum is visible to birds. Indoor birds that are not provided UVA light are virtually color blind, which can lead to psychological distress, feather plucking, or other destructive behaviors.

Can be used in a regular light fixture or in Avian Sun's Floor Lamp.

UVA & UVB emissions last approximately 6 months.