Access to full spectrum light is essential for the long term health of your bird.  Birds need natural lighting to maintain proper nutrition and aid in the digestion of certain vitamins.  Fortunately, we can provide this natural light inside our homes with full spectrum light fixtures and bulbs.  An ideal style is the floor lamp model which can be set beside your bird cage.  Setting your bird cage near a window will let in light, but the glass prevents the bird from receiving the beneficial UVB rays.  Full sprectrum light resolves this problem. Learn more about the reasons birds need full-spectrum lighting from the informative article by Lighting and Your Bird and at UVB & Birds.