There is a huge difference between the phrases ”Where light is present” and ”direct Florida sunlight”. If we educate our customers about how to place artwork, they can be viewed for years and years. Compared to other art forms, today's pigment prints on acid free papers have about the same longevity. Maybe not oils, but most other art forms.
One of the unaccounted for factors is heat. The worst fading I have ever seen of a pigmented ink print on acid free paper was not due to light, but heat. The home owner hung it above a LCD Rear Projection TV. It received no direct sunlight, but got almost constant heat from TV. Two years later it was badly faded and yellowed. A print under glass in sunlight is not only getting light (UV), but heat as well.
BTW, this is why accelerated testing needs to be adjusted for the higher heat the print gets with high intensity light over a shorter period of time versus low intensity light over an extended period.