Sage Square Compact Fluorescent Bird Lamp || Full Spectrum Lighting Bulb, 2.4% UVB, 20W || All kinds of Birds LED Fridge Freezer Light Bulb  (20 W)

Sage Square UVB enables birds to produce vitamin D, also known as the “sunshine vitamin,” which is essential for calcium metabolism and immune function. Birds have thinner skin and corneas compared to mammals. This is why they appear to be more sensitive to ultraviolet light than mammals and reptiles. Vitamin D is the only vitamin that normally requires a specific type of light (ultraviolet light, which comes from the sun) to convert it into its active form. When birds in the wild ingest Vitamin D in their food, the sun’s ultraviolet fraction converts it into a fundamental component of good health – the chemically active form Vitamin D3. Without this exposure to sunlight, Vitamin D deficiency problems such as rickets can develop in birds.