Bird Full Spectrum Light Bulbs for Parrots, Plants, Animals Bird year round quality compact natural light bulb for parrot health Manufactured for a positive effect on a bird's physical and mental well-being Simulates natural sunlight; enhances Vitamin D synthesis; use year round as window filtered sunlight is not beneficial to your bird Spiral fluorescent bulb with a standard screw in base Multi purpose; used for a grow light for indoor plants and seedlings and a popular bulb for task lighting