Audio File 1. All the major lamp manufacturers have lamps that fall into this class, although they are not all marketed as full-spectrum lamps. I've heard that full-spectrum lighting is better than regular fluorescent lighting. Full-spectrum lighting is neither better nor worse than any other lamp type. Claims made for its beneficial effects go beyond what the scientific literature will support.
Daylight is neither better nor worse than other light sources.
Daylight is a good light source in that it's energy efficient, but like any light source it needs to be controlled. Direct sunlight coming in your window, with no shades or blinds, isn't necessarily better than well-directed electric light. If it shines right on your computer screen it can make it impossible to see, and if it shines right in your eyes it's uncomfortable. Good lighting is directed in the right places, to provide light where it's needed and to make spaces attractive. Sometimes the best source will be daylight, sometimes it will be electric light, sometimes it will be a combination of both.