The former is a noun，usually，rather the latter is an adjective. The noun occasionally appears in works of art and literature. The light，you know，such as“the god of light”“incarnation of light”
“Bright” is the meaning in English of the latter of your question，So “your future/prospect all in light that bright”，you can pick and utilize all the alternatives in your case actually，but the former mentioned in your question has more use in many scope: novels, files of proposal，banners，and so on. That's why the other answer offered to you is like that.