This is a great point, Fluorescence is the ability of an object to reflect light of a longer wavelength. This is a paragraph from the book What Fish See by Dr. Colin Kageyama, O.D F.V.D..
"A fluorescent red object would look red whether it is struck by ultraviolet, blue, green, or red light. A fluorescent colored lure can appear two or three times as bright as the visible light that strikes it because it converts invisible light and reflects it off as visible light.
A red non-fluorescence object will only appear red if struck by red light, if it is struck by only U.V.,blue,green it will just appear dark. A non-fluorescent object cannot reflect more than 100% of the visible light that strikes it.
Great book, you should give it a look if you have not read it.